MC9246-VISUAL PROGRAMMING LAB LABORATORY MANUAL

Dr.N.N.C.E MCA / IV VP LAB-LM

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MC9246-VISUAL PROGRAMMING LAB

LABORATORY MANUAL

FOR IV SEMESTER MCA

(FOR PRIVATE CIRCULATION ONLY)

ANNA UNIVERSITY ,CHENNAI

DDEEPPAARRTTMMEENNTT OOFF CCOOMMPPUUTTEERR SSCCIIEENNCCEE AANNDD EENNGGIINNEEEERRIINNGG

Dr. NAVALAR NEDUNCHEZHIYAN COLLEGE OF ENGINEERING

TTHHOOLLUUDDUURR –– 660066330033,,CCUUDDDDAALLOORREE DDIISSTTRRIICCTT


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GENERAL INSTRUCTIONS FOR LABORATORY CLASSES

DO’S

o Without Prior permission do not enter into the Laboratory.

o While entering into the LAB students should wear their ID cards.

o The Students should come with proper uniform.

o Students should sign in the LOGIN REGISTER before entering into the laboratory.

o Students should come with observation and record note book to the laboratory.

o Students should maintain silence inside the laboratory.

o After completing the laboratory exercise, make sure to shutdown the system properly.

DONT’S

o Students bringing the bags inside the laboratory..

o Students wearing slippers/shoes insides the laboratory.

o Students using the computers in an improper way.

o Students scribbling on the desk and mishandling the chairs.

o Students using mobile phones inside the laboratory.

o Students making noise inside the laboratory.


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HARDWARE REQUIREMENTS: INTEL PENTIUM 915 GV 80GB HDD 512MB DDR

SOFTWARE REQUIREMENTS: Visual Basic

UNIVERSITY PRACTICAL EXAMINATION Allotment of marks

Internal assessment = 20 marks Practical assessment = 80 marks

--------------- Total = 100 marks

---------------

INTERNAL ASSESSMENT (20 marks)

Staff should maintain the assessment Register and the Head of the Department should monitor it. SPLIT UP OF INTERNAL MARKS

Observation = 3 marks Record Note = 7 marks Modal Exam = 5 marks Attendance = 5 marks

--------------------- Total = 20 marks

---------------------

UNIVERSITY EXAMINATION

The exam will be conducted for 100 marks. Then the marks will be calculated to 80 marks. SPLIT UP OF PRACTICAL EXAMINATION MARKS

Aim and Algorithm = 30 marks Program = 40 marks Output = 20 marks Viva-voce = 10 marks

-------------- Total = 100 marks

--------------


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MC9246 – VISUAL PROGRAMMING LABORATORY

LIST OF EXPERIMENTS VB

1. Form Design – Keyboard & Mouse events

2. Programs on usage of data types - variant, Control arrays

3. Simple applications using file system controls

4. Database applications using data control.

VC++ 1. SDK type programs for creating simple windows with different window styles

2. SDK type programs code for keyboard and mouse events, GDI objects.

3. Simple Dialog Based application – eg. Calculator, interest computation, money

conversions, etc.

4. Creating SDI & MDI applications, Modal and Modeless dialog.

5. Programming for reading and writing into documents.

6. Coding Dynamic controls – slider control, progress control, inheriting CtreeView and

CricheditView.

7. Creating static and dynamic splitter windows

8. Creating DLLs and using them.

9. Winsock and WinInet & Internet Explorer common controls.

10. Data access through ODBC – Cdatabase, Crecordset.

11. Creating ActiveX control and using it.


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CONTENTS

S. No Name of the Experiment Pg.No.

Visual Basic

1 Form Design – Keyboard & Mouse events

2 Programs on usage of data types - variant, Control

arrays

3 Simple applications using file system controls

4 Database applications using data control

VC++

5 SDK type programs for creating simple windows with different window styles

6 SDK type programs code for keyboard and mouse events, GDI objects.

7 Simple Dialog Based application

8 Creating SDI & MDI applications, Modal and Modeless dialog.

9 Programming for reading and writing into documents.

10 Dynamic controls

11 static and dynamic splitter windows

12 DDL

13 Winsock and WinInet & Internet Explorer common

controls.

14 Data access through ODBC

15 Creating ActiveX control


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Exercise Number: 1

Title of the Exercise : Form Design – Keyboard & Mouse events

Date of the Exercise :

OBJECTIVE (AIM) OF THE EXPERIMENT

• To Create a form and interact with the mouse and keyboard using VB. FACILITIES REQUIRED AND PROCEDURE

a) Facilities Required:

S.No. Facilities required Quantity

1 System 1

2 O/S Windows XP

3 S/W name Microsoft Visual Studio 6.0

b) Procedure:

Step

no.

Details of the step

1 Start →programs Microsoft Visual Studio6.0→Microsoft Visual Basic.

2 Visual basic can be opened.

3 Select File→New→standard.exe , then give the project name and then

choose empty project button and finally give finish→OK.

4 Design the form.

5 Type the coding.

6 Build and test the application

c) Program:

Private Sub cmd_Exit_Click() Unload Me End Sub

Private Sub cmd_Ok_Click() MsgBox " Reg.NO: " & txt_RegNo.Text & " Name: " & _ txt_name.Text & " Address: " & txt_address.Text & _ " Branch: " & txt_Branch.Text End Sub


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Private Sub Lbl_Message_DblClick() MsgBox (" this is a label to show the events and messages") End Sub

Private Sub txt_Address_LostFocus() Lbl_Message.Caption = "txt_Address_LostFocus event" End Sub

Private Sub Txt_Name_Change() Lbl_Message.Caption = "No. of letters in name :" & Len(txt_name.Text) End Sub

Private Sub txt_RegNo_GotFocus() Lbl_Message.Caption = "txt_RegNo_GotFocus event" End Sub

d) Output

e) Result:

`Thus the program has been executed successfully.

VIVA - QUESTIONS

1. What are the different types of text editing tools?

Edit control and Windows rich edit common control

The MFC library supports this versatility with the CEditView and CRichEditView

classes.

2.How one can create a new Toolbar? (A.U.May-2010) (A.U. May-2012)

To create toolbar, select toolbar from the Resource tab of the workspace pane and double

click on IDR_MAINFRAME. Now, the toolbar dialog window appears. Double click on the blank

tool and drag a control from the tools control and drop it in the toolbar drawing area. Now view

the ID of the tool from the properties dialog of the tool created.


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Exercise Number: 2

Title of the Exercise : Programs on usage of data types - variant, Control arrays



• To create an application with the data types, variants, and array using VB. FACILITIES REQUIRED AND PROCEDURE



1 System 1

2 O/S Windows XP


b) Procedure:

Step

no.

Details of the step





4 Design the form.

5 Type the coding.


c) Program:

Private Sub Form_Load( ) Me.WindowState=2 End Sub

Private Sub Option1_Click( ) If Option1.Value=True Then Text3.Text=Val(Text1.Text]+Val(Text2.Text) End Sub

Private Sub Option2_Click( ) If Option1.Value=True Then Text3.Text=Val(Text1.Text]-Val(Text2.Text)


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End Sub

Private Sub Option3_Click( ) If Option1.Value=True Then Text3.Text=Val(Text1.Text]*Val(Text2.Text) End Sub

Private Sub Option4_Click( ) If Option1.Value=True Then Text3.Text=Val(Text1.Text]/Val(Text2.Text) End Sub

d) Output

e) Result:

`

Thus the program has been executed successfully.

VIVA - QUESTIONS

1. How one can assign the tool tips in a toolbar? i. To create a ToolTip, you simply add the tip text to the end of the menu

prompt, preceded by a newline (\n) character. The resource editor lets you edit the prompt string while you are editing the toolbar images. Just double-click in the left panel.

2. Explain the status bar definitions. ii. The status bar window neither accepts user input nor generates command

messages. The status bar supports two types of text panes—message line panes and status indicator panes.

iii. The static indicators array that AppWizard generates in the MainFrm.cpp file defines the panes for the application's status bar. The CStatusBar::SetIndicators member function, called in the application's derived frame class, configures the status bar according to the contents of the indicators array.


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Exercise Number: 3

Title of the Exercise : Simple applications using file system controls



• To Create an application for file system controls using VB. FACILITIES REQUIRED AND PROCEDURE



1 System 1

2 O/S Windows XP


b) Procedure:

Step

no.

Details of the step



3 Select File→New→standard.exe , then give the project name and then choose empty

project button and finally give finish→OK.

4 Design the form.

5 Type the coding.


c) Program:

Private Sub Dir1_Change() File1.Path = Dir1.Path End Sub Private Sub Drive1_Change() Dir1.Path = Drive1.Drive End Sub Private Sub cmd_ListAllDrives_Click() ' Scan the contents of the DriveListBox control List1.Clear List1.AddItem "LIST OF DRIVES" For i = 0 To Drive1.ListCount - 1 List1.AddItem Drive1.List(i)


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Next End Sub Private Sub cmd_ListAllFiles_Click() ' Scan the contents of the FileListBox control List1.Clear List1.AddItem "LIST OF FILES" For i = 0 To File1.ListCount - 1 List1.AddItem File1.List(i) Next End Sub Private Sub cmd_ListAllSubFolders_Click() ' Scan the contents of the DirListBox control List1.Clear List1.AddItem "LIST OF SUBFOLDERS" For i = 0 To Dir1.ListCount - 1 List1.AddItem Dir1.List(i) Next End Sub Private Sub cmd_ListAllParentFolders_Click() List1.Clear List1.AddItem "LIST OF PARENT FOLDERS" pDepth = -1 While Dir1.List(pDepth) <> "" List1.AddItem Dir1.List(pDepth) pDepth = pDepth - 1 Wend List1.AddItem "The current folder is nested " & _ -pDepth + 1 & " folders deep" End Sub

d) Output


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e) Result:


VIVA - QUESTIONS

1. Explain the CFormView class.

iv. A CFormView object receives notification messages directly from its

controls, and it receives command messages from the application

framework. This application framework command-processing ability clearly

separates CFormView from CDialog, and it makes controlling the view from

the frame's main menu or toolbar easy.

v. The CFormView class is derived from CView (actually, from CScrollView)

and not from CDialog. You can't, therefore, assume that CDialog member

functions are supported. CFormView does not have virtual OnInitDialog,

OnOK, and OnCancel functions.

2.Define TRACE macro.

vi. TRACE statements are active whenever the constant _DEBUG is defined

(when you select the Debug target and when the afxTraceEnabled variable

is set to TRUE). TRACE statements work like C language printf statements,

but they're completely disabled in the release version of the program. Here's

a typical TRACE statement:

vii. int nCount = 9;

viii. CString strDesc("total");

ix. TRACE("Count = %d, Description = %s\n", nCount, strDesc);

3.What do you mean by serialization?

x. The idea is that objects can be persistent, which means they can be saved on

disk when a program exits and then can be restored when the program is

restarted. This process of saving and restoring objects is called serialization.

4.What are the classes used in MDI applications?

xi. Six classes are used in MDI. They are,

CView, CDocument, CDialog, CWinApp, CMainFrame, CChildFrame


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Exercise Number: 4

Title of the Exercise : Database applications using data control



• To Create an database using data control and implement it in an application using

VB.

FACILITIES REQUIRED AND PROCEDURE



1 System 1

2 O/S Windows XP


b) Procedure:

Step

no.

Details of the step





4 Design the form.

5 Type the coding.


c) Program:

Dim db As Database Dim rs As Recordset Dim rs1 As Recordset Dim sql As String Private Sub Cmd_Delete_Click() Set rs1 = db.OpenRecordset("select count(*) from student1 where rollno=" & _ Val(Txt_ROllNo.Text)) If Txt_ROllNo.Text = "" Then MsgBox "enter a valid roll number" Exit Sub


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End If If rs1(0) = 0 Then MsgBox ("there are no records with this roll number") Exit Sub End If db.Execute ("delete from student1 where rollno=" & _ Val(Txt_ROllNo.Text)) MsgBox ("record deleted") End Sub Private Sub Cmd_Edit_Click() Clear_Controls Cmd_Edit.Enabled = False End Sub Private Sub cmd_Exit_Click() Unload Me End Sub Private Sub Cmd_Save_Click() If Cmd_Insert.Enabled = False Then sql = " insert into student1 values(" & _ CInt(Txt_ROllNo.Text) & ",'" & _ Txt_Name.Text & "','" & _ Txt_Address.Text & "'," & _ CDbl(Txt_MobileNumber.Text) & ")" MsgBox sql db.Execute (sql) MsgBox ("record inserted") Cmd_Insert.Enabled = True End If If Cmd_Edit.Enabled = False Then sql = "update student1 set name='" & Txt_Name.Text & " ',address='" & _ Txt_Address.Text & "',mobilenumber=" & _ CDbl(Txt_MobileNumber.Text) & " where (RollNO= " & _ CInt(Txt_ROllNo.Text) & ")" MsgBox sql db.Execute (sql) MsgBox ("record updated") Cmd_Edit.Enabled = True End If End Sub Private Sub Form_Load() Set db = OpenDatabase("D:\pavan\VbLabManual\Prg1\mca1.mdb", True) Set rs = db.OpenRecordset("student1", dbOpenDynaset) rs.MoveFirst


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'Show_Data End Sub Private Sub Cmd_First_Click() rs.MoveFirst Show_Data End Sub Private Sub Cmd_Last_Click() rs.MoveLast Show_Data End Sub Private Sub Cmd_Next_Click() rs.MoveNext Show_Data End Sub Private Sub Cmd_Previous_Click() rs.MovePrevious Show_Data End Sub Private Sub Cmd_Insert_Click() Clear_Controls Cmd_Insert.Enabled = False Txt_ROllNo.SetFocus End Sub Private Sub Show_Data() If rs.EOF Then rs.MoveLast End If If rs.BOF Then rs.MoveFirst End If Txt_ROllNo.Text = rs(0) Txt_Name.Text = rs(1) Txt_Address.Text = rs(2) Txt_MobileNumber.Text = rs(3) End Sub Private Sub Clear_Controls() Txt_ROllNo.Text = "" Txt_Name.Text = "" Txt_Address.Text = "" Txt_MobileNumber.Text = "" End Sub


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d) Output

e) Result:


VIVA - QUESTIONS

1. What do you mean by SQL? Structured Query Language (SQL), a standard database access language with its own

grammar. In the SQL world, a database is a collection of tables that consist of rows and columns. Many DBMS products support SQL, and many programmers know SQL. 2. What Databases Can You Open with DAO? (A.U.APRIL 2007)

Opening an Access database (MDB file)—An MDB file is a self-contained database that includes query definitions, security information, indexes, relationships, and of course the actual data tables. You simply specify the MDB file's pathname.

Opening an ODBC data source directly—There's a significant limitation here. You can't open an ODBC data source that uses the Jet engine as a driver; you can use only data sources that have their own ODBC driver DLLs.

Attaching external tables to an Access database—This is actually the preferred way of using DAO to access ODBC data. First you use Access to attach the ODBC tables to an MDB file, and then you use DAO to open the MDB file as in the first option. You can also use Access to attach ISAM files to an MDB file.


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Exercise Number: 5

Title of the Exercise : Windows Creation Program



• To Create a simple window using vc++ programming




1 System 1

2 O/S Windows XP


b) Procedure:

Step Details of the step

1 Start →programs Microsoft Visual Studio6.0→Microsoft Visual C++6.0.

2 Visual C++ Window will be opened.

3 Select File→New→Win32 Application, then give the project name and

then choose empty project button and finally give finish→OK.

4 Again go to File→New→C++ Source File→File Name→OK.

5 Type the coding.


c) Program:

#include <windows.h>

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,PSTR

szCmdLine,int iCmdShow)

{

static TCHAR szAppName[]=TEXT("HelloWin");

HWND hwnd;

MSG msg;

WNDCLASS win1;


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win1.style=CS_HREDRAW|CS_VREDRAW;

win1.lpfnWndProc=WndProc;

win1.cbClsExtra=0;

win1.cbWndExtra=0;

win1.hInstance=hInstance;

win1.hIcon=LoadIcon(NULL,IDI_APPLICATION);

win1.hCursor=LoadCursor(NULL,IDC_WAIT);

win1.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);

win1.lpszMenuName=NULL;

win1.lpszClassName=szAppName;

if(!RegisterClass(&win1))

{

MessageBox(0,"welcome",szAppName,MB_OK);

return FALSE;

}

hwnd=CreateWindow(szAppName,"vasanth",WS_OVERLAPPEDWINDOW,10,20,500,4

00,NULL,NULL,hInstance,NULL);

ShowWindow(hwnd,iCmdShow);

UpdateWindow(hwnd);

while(GetMessage(&msg,0,0,0))

{

TranslateMessage(&msg);

DispatchMessage(&msg);

}

return (0);

}

LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM

wParam,LPARAM lParam)

{

HDC hdc;

PAINTSTRUCT ps;

RECT rect;

switch(message)

{


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case WM_PAINT:

hdc=BeginPaint(hwnd,&ps);

GetClientRect(hwnd,&rect);

DrawText(hdc,TEXT("Hello"),-

1,&rect,DT_SINGLELINE|DT_CENTER|DT_VCENTER);

EndPaint(hwnd,&ps);

return(0);

case WM_DESTROY:

PostQuitMessage(0);

return(0);

}

return DefWindowProc(hwnd,message,wParam,lParam);

}

d) Output

e) Result:


VIVA - QUESTIONS

1.Define WINAPI?(A.U.APRIL 2007)

The WINAPI identifier is defined in WINDEF.H with the statement:

#define WINAPI __stdcall


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This statement specifies a calling convention that involves how machine code is

generated to place function call arguments on the stack. Most Windows function calls are

declared as WINAPI.

2.What is use of Message Box function?

The Message Box function is used to display short messages. The little window

that Message Box displays is actually considered to be a dialog box.

3. What are the function calls used in windows programming?

LoadIcon Loads an icon for use by a program.

LoadCursor Loads a mouse cursor for use by a program.

GetStockObject Obtains a graphic object, in this case a brush used for painting the

window's background. RegisterClass Registers a window class for the program's

window. \

MessageBox Displays a message box.

CreateWindow Creates a window based on a window class.

4. What is a Handle? What is its advantage?

A handle is simply a number (usually 32 bits in size) that refers to an object. The handles in

Windows are similar to file handles used in conventional C or MS-DOS programming. A program

almost always obtains a handle by calling a Windows function. The program uses the handle in

ther Windows functions to refer to the object. The actual value of the handle is unimportant to your

program, but the Windows module that gives your program the handle knows how to use it to

reference the object.

5. How will you display the window? (APRIL 2007) i. After the CreateWindow call returns, the window has been created internally

in Windows. Then call the following 2 functions,

a.ShowWindow (hwnd, iCmdShow); The first argument is the handle to the window just created by CreateWindow.

Win Main. The second argument is the iCmdShow value passed as a parameter to .

ii. The ShowWindow function puts the window on the display. If the second argument to ShowWindow is SW_SHOWNORMAL, the client area of the window is erased with the background brush specified in the window class. The function call

b. UpdateWindow (hwnd); i. It causes the client area to be painted.


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Exercise Number: 6

Title of the Exercise : Keyboard and Mouse Event



• To write a program for Keyboard and mouse event using Win 32 Application.




1 System 1

2 O/S Windows XP


b) Procedure:

Step no.

Details of the step

1 Create a project named key mouse from File->New and select Win32Application

2 Create a c++ file from File->New then select C++ Source File and give the File name

as key mouse

3 Define the WNDCLASS structure and Register it using RegisterClass( )

4 Create the window using Create Window function with specifying parameters

5 Extract the message from the message queue and dispatch it to the procedure using

Get Message & Dispatch Message respectively

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The window message WM_LBUTTONDOWN, WM_LBUTTONUP,

WM_MOUSEMOVE is generated when the mouse is clicked, released, and moved

respectively and its status information are stored in flag variables

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The line is drawn between (x1,y1) and (x2,y2) using MoveToEx() and LineToEx(),

here (x1,y1) is the current mouse co-ordinates after mouse move the current mouse

co-ordinates stored in (x2,y2) then the next step it is assigned to (x1,y1).

8 Build and Execute from Build->Build keymouse.exe then Build->Execute

keymouse.exe


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c) Program:

#include<windows.h>

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,PSTR szCmdLine,int

iCmdShow)

{

static TCHAR szAppName[]=TEXT("HelloWin");

HWND hwnd;

MSG msg;

WNDCLASS wndclass;

wndclass.style =CS_HREDRAW | CS_VREDRAW;

wndclass.lpfnWndProc =WndProc;

wndclass.cbClsExtra =0;

wndclass.cbWndExtra =0;

wndclass.hInstance =hInstance;

wndclass.hIcon =LoadIcon(NULL,IDI_APPLICATION);

wndclass.hCursor =LoadCursor(NULL,IDC_ARROW);

wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);

wndclass.lpszMenuName=NULL;

wndclass.lpszClassName=szAppName;

if(!RegisterClass(&wndclass))

{

MessageBox(NULL,TEXT("This prog requires windows

NT"),szAppName,MB_ICONERROR);

}

hwnd=CreateWindow(szAppName,TEXT("The Hello

Program"),WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,CW_USE

DEFAULT,CW_USEDEFAULT,NULL,NULL,hInstance,NULL);

ShowWindow(hwnd,iCmdShow);

UpdateWindow(hwnd);

while(GetMessage(&msg,NULL,0,0))

{


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TranslateMessage(&msg);

DispatchMessage(&msg);

}

return msg.wParam;

}

LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM

lParam)

{

HDC hdc;

static int x1,y1,x2,y2,flag=0;

switch(message)

{

case WM_LBUTTONDOWN:

if(flag==0)

{

x1=LOWORD(lParam);

y1=HIWORD(lParam);

flag=1;

}

return 0;

case WM_MOUSEMOVE:

if(flag==1)

{

x2=LOWORD(lParam);

y2=HIWORD(lParam);

hdc=GetDC(hwnd);

MoveToEx(hdc,x1,y1,0);

LineTo(hdc,x2,y2);

x1=x2;

y1=y2;

}

return 0;

case WM_LBUTTONUP:

flag=0;


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return 0;

case WM_KEYUP:

MessageBox(0,TEXT("Up Key is Pressed"),TEXT("Key

Information"),MB_ICONINFORMATION);

break;

case WM_KEYDOWN:

MessageBox(0,TEXT("Down Key is Pressed"),TEXT("Key

Information"),MB_ICONINFORMATION);

break;

case WM_DESTROY:

PostQuitMessage(0);

return 0;

}

return DefWindowProc(hwnd,message,wParam,lParam);

}

d) Output:

e) Result:



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VIVA - QUESTIONS

1. What are the arguments available in WinMain () function?

WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int

nShowCmd);

2. Give the syntax for creating the window?

ii. hwnd = CreateWindow (szAppName, // window class name

iii. TEXT ("The Hello Program"), // window caption

iv. WS_OVERLAPPEDWINDOW, // window style

v. CW_USEDEFAULT// initial x osition

vi. CW_USEDEFAULT// initial y position

vii. CW_USEDEFAULT// initial x size

viii. CW_USEDEFAULT// initial y size

ix. NULL// parent window handle

x. NULL// window menu handle

xi. hInstance// program instance handle

3. Give the attributes of window class. (A.U.APRIL 2007) typedef struct

{

INT style;

NDPROC lpfnWndProc;

int cbClsExtra;

int cbWndExtra;

INSTANCE hInstance;

HICON hIcon;

CURSOR hCursor;

BRUSH hbrBackground;

PCTSTR lpszMenuName;

PCTSTR lpszClassName;

WNDCLASS;

NDCLASS wndclass; }

.


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Exercise Number: 7

Title of the Exercise : Dialog based Application



• To perform the calculator operation using VC++ programming




1 System 1

2 O/S Windows XP


b) Procedure:

Step no. Details of the step

1 Start →programs Microsoft Visual Studio6.0→Microsoft Visual C++6.0

2 File→ New→ MFC AppWizard (exe) →project name →ok.

3 Choose Dialog Based Applications finish.

4 Dialog box will be opened.

5 Design the dialog box like this.

6 Change each of the button name as 0,1,=,+

7 After adding button name the dialog box look like this.

8 Right click on the edit box and choose Class Wizard click on the Member Variables

9 Tab and choose IDC_EDIT1→Add Variable and member variable name as m_t1


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10 Click on the 0 button give the member function name and give 0K.

11 Add the Coding for each buttons like this.

12 In the CalcDlg header file under the construction comment line add the declaration part.

13 i.e int index,val,data,data1;

double m,a,b;

char temp [10];


c) Program:

//eDlg.h header file int index,val,data,data1; double m,a,b; char temp[10]; //eDlg.cpp void CEDlg::OnOne() { UpdateData(true); if(m_t1=="0"|| m_t1==" ") m_t1="1"; else m_t1+="1"; UpdateData(false); } void CEDlg::OnZero() { UpdateData(true); if(m_t1=="0"|| m_t1==" ") m_t1="0"; else m_t1+="0"; UpdateData(false); } void CEDlg::Ontwo() { UpdateData(true); if(m_t1=="0"|| m_t1==" ") m_t1="2"; else m_t1+="2"; UpdateData(false);// TODO: Add your control notification handler code here } void CEDlg::Onthree()


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{ UpdateData(true); if(m_t1=="0"|| m_t1==" ") m_t1="3"; else m_t1+="3"; UpdateData(false);// TODO: Add your control notification handler code here } void CEDlg::Onfour() { UpdateData(true); if(m_t1=="0"|| m_t1==" ") m_t1="4"; else m_t1+="4"; UpdateData(false);// TODO: Add your control notification handler code here } void CEDlg::Onfive() { UpdateData(true); if(m_t1=="0"|| m_t1==" ") m_t1="5"; else m_t1+="5"; UpdateData(false);// TODO: Add your control notification handler code here } void CEDlg::Onsix() { UpdateData(true); if(m_t1=="0"|| m_t1==" ") m_t1="6"; else m_t1+="6"; UpdateData(false);// TODO: Add your control notification handler code here } void CEDlg::Onseven() { UpdateData(true); if(m_t1=="0"|| m_t1==" ") m_t1="7"; else m_t1+="7"; UpdateData(false);// TODO: Add your control notification handler code here } void CEDlg::Oneight() {


29

UpdateData(true); if(m_t1=="0"|| m_t1==" ") m_t1="8"; else m_t1+="8"; UpdateData(false);// TODO: Add your control notification handler code here } void CEDlg::Onnine() { UpdateData(true); if(m_t1=="0"|| m_t1==" ") m_t1="9"; else m_t1+="9"; UpdateData(false);// TODO: Add your control notification handler code here } void CEDlg::Onsine() { UpdateData(true); m=atof(m_t1); m=(m*3.14)/180; a=sin(m); sprintf(temp,"%f",a); m_t1=temp; UpdateData(false); } void CEDlg::Onclear() { UpdateData(true); m_t1="0"; UpdateData(false); } void CEDlg::Onequal() { UpdateData(true); switch(index) { case 0: { UpdateData(true); a=atof(m_t1); b=a+m; sprintf(temp,"%f",b); m_t1=temp; UpdateData(false); break; }


30

case 1: { UpdateData(true); a=atof(m_t1); b=í-a; sprintf(temp,"%f",b); m_t1=temp; UpdateData(false); break; } case 2: { UpdateData(true); a=atof(m_t1); b=a*m; sprintf(temp,"%f",b); m_t1=temp; UpdateData(false); break; } case 3: { UpdateData(true); a=atof(m_t1); b=m/a; sprintf(temp,"%f",b); m_t1=temp; UpdateData(false); break; } } UpdateData(false); } void CEDlg::Onclear() { UpdateData(true); m_t1="0"; UpdateData(false); // TODO: Add your control notification handler code here } void CEDlg::Onplus() { UpdateData(true); m=atof(m_t1); m_t1=" "; index=0; UpdateData(false); }}


31

d) Output:

e) Result:


VIVA QUESTION AND ANSWER 1. Why we need Visual C++?( A.U.May-2010) The Visual C++ tools reduce coding drudgery Graphical User Interface Using MFC, which simplify and speed development of windows applications.

It includes sophisticated resource editors to design complex dialog boxes, menus, toolbars, images and many other elements of modern windows applications.

2. What are the applications used in AppWizard? (A.U. May-2012) a. Single Document Interface b. Multiple Document Interface c. Dialog Based

3. How one can add a new menu item in a dialog window? To create a new menu bar by using resource editor, give the name as “newmenu”.Open

the dialog window, then select the dialog property window. Now select the menu property, choose “newmenu” option.we can construct a CMenu object, use the CMenu::LoadMenu function to load the menu from the resource, and call the CWnd::SetMenu function to attach the new menu to the frame window.


32

Exercise Number: 8

Title of the Exercise : MDI Application



• To create a MDI application to display a rectangle and apply pattern brush in it.




1 System 1

2 O/S Windows XP


b) Procedure:


1 Create a project named MDI from File->New and select MFCAppWizard(exe) and the next step select Multiple documents and the next step uncheck the ActiveXControl support and finish it.

2 Use the Class Wizard to add WM_PAINT message to the View class, to do select MDIView in both class name and Object IDs in the Class Wizard then double click WM_PAINT message in the Messages field

3 Edit the code for OnPaint message handler function

4 Build and execute the program, click File->New, a new document is opened.

c) Program:

void CMDIView::OnPaint( ) { CPaintDC dc(this); CBrush br; br.CreateSolidBrush(RGB(255,0,0)); dc.SelectObject(br); dc.Rectangle(20,30,80,95); }


33

d) Output:

e) Result:


VIVA QUESTION AND ANSWER 1. Differentiate SDI and MDI.

The MFC library supports two distinct application types: Single Document Interface

(SDI) and Multiple Document Interface (MDI). An SDI application has, from the user's point

of view, only one window. If the application depends on disk-file "documents," only one

document can be loaded at a time. The original Windows Notepad is an example of an SDI

application. An MDI application has multiple child windows, each of which corresponds to an

individual document. Microsoft Word is a good example of an MDI application.

What is an MFC? (A.U.APRIL 2007) (A.U. May-2012)

MFC is a Microsoft Foundation Class.

MFC is an object-oriented interface to windows.

MFC encapsulates key windows data structures.

Goal of MFC, facilitating and simplifying the process of programming for Microsoft

windows.

MFC library is a collection of C++ classes, it is provided as a DLL.

What is the purpose of OnUpdate() function?

This virtual function is called by the application framework in response to your

application's call to the CDocument::UpdateAllViews function. Your derived view class's

OnUpdate function accesses the document, gets the document's data, and then updates the view's

data members or controls to reflect the changes.


34

Exercise Number: 9 Title of the Exercise : Reading and Writing a Document Date of the Exercise :


• To create a MFC application for reading and writing a document.




1 System 1

2 O/S Windows XP


b) Procedure:

Step

no.

Details of the step

1 Create project named Menu and accept all the default settings but two: select Single

Document and deselect Print Preview.

2 Click on the Resource view tab in the Workspace window. Edit the IDR_MAINFRAME

menu resources to add a separator and Clear Document item to the edit menu, as shown

here

3 Now add a Transfer menu, and then define the underlying items

4 Open IDR_MAINFRAME in the accelerator folder, And then use the insert key to add

the following items(turn off the Ctrl, Alt, Shift modifiers)

Accelerator ID Key

ID_TRANSFER_GETDATA

ID_TRANSFER_STOREDA

TA

VK_F2

VK_F3

5 Use the class wizard to add the following message handler to the CMenuView class (in


35

the class wizard select CMenuView class)

Object ID Message Member Function

ID_TRANSFER_GETDAT

A

ID_TRANSFER_STORED

ATA

ID_TRANSFER_STORED

ATA

COMMAND

COMMAND

UPDATE_COMMAND

_UI

OnTransferGetData

OnTransferStoreData

OnUpdateTransferStore

Data

6 Use the class wizard to add the following message handler to the CMenuDoc class (in

the class wizard select CMenuDoc class)

Object ID Message Member Function

ID_EDIT_CLEARDOCUM

ENT

ID_EDIT_CLEARDOCUM

ENT

COMMAND

UPDATE_COMMAND

_UI

OnEditClearDocument

OnUpdateEditClearDocu

ment

7 In the class view window, right click on CMenuDoc class and select Add Member

Variable, now type CString as Varaible Type, m_strText as Variable Name and access

as public.

8 Edit the OnNewDocument, command handler function(added by us) in MenuDoc.cpp

(in the File View tab)

9 In the class view window, right click on CMenuView class and select Add Member

Variable, now type CRichEditCtrl as Varaible Type, m_rich as Variable Name and

access as public.

10 Open the Class Wizard (Ctrl+W), select CMenuView in class name field, select

CMenuView and double click WM_CREATE and WM_SIZE then accept the default

function handler name. Edit the code for the two handler functions and also edit

command handler function which is created by us.

11 Build and Execute the application.

c) Program:

// CMenuDoc.cpp

BOOL CMenuDoc::OnNewDocument()

{ if (!CDocument::OnNewDocument())


36

return FALSE;

m_strText="Hello(from CMenuDoc::OnNewDocument()";

// (SDI documents will reuse this document)

return TRUE; } void CMenuDoc::OnEditCleardocument() { m_strText.Empty(); }

void CMenuDoc::OnUpdateEditCleardocument(CCmdUI* pCmdUI)

{ pCmdUI->Enable(!m_strText.IsEmpty()); }

// CMenuView.cpp

int CMenuView::OnCreate(LPCREATESTRUCT lpCreateStruct)

{ CRect rect(0,0,0,0);

if (CView::OnCreate(lpCreateStruct) == -1)

return -1;

m_rich.Create(ES_AUTOVSCROLL|ES_MULTILINE|ES_WANTRETURN|WS_CHILD|

WS_VISIBLE|WS_VSCROLL,rect,this,1);

return 0; }

void CMenuView::OnSize(UINT nType, int cx, int cy)

{ CRect rect;

GetClientRect(rect);

m_rich.SetWindowPos (&wndTop,0,0,rect.right-rect.left ,rect.bottom -rect.top

,SWP_SHOWWINDOW);

CView::OnSize(nType, cx, cy); }

void CMenuView::OnTransferGetdata()

{ CMenuDoc* pDoc=GetDocument();

m_rich.SetWindowText (pDoc->m_strText);

m_rich.SetModify(FALSE); }

void CMenuView::OnTransferStoredata()

{ CMenuDoc* pDoc=GetDocument();

m_rich.GetWindowText (pDoc->m_strText);

m_rich.SetModify(FALSE); }

void CMenuView::OnUpdateTransferStoredata(CCmdUI* pCmdUI)

{ pCmdUI->Enable(m_rich.GetModify()); }


37

d) Output:

e) Result:



38

VIVA QUESTION AND ANSWER 1. Give the resources for SDI.

Resource Description

Accelerator Definitions for keys that simulate menu and toolbar

selections.

Dialog Layout and contents of dialog boxes.

Icon

Icons (16-by-16-pixel and 32-by-32-pixel versions), such as

the application icon you see in Microsoft Windows Explorer

and in the applications About dialog box.

Menu The application's top-level menu and associated pop-up

menus.

String table Strings that are not part of the C++ source code.

Toolbar The row of buttons immediately below the menu.

Version Program description, version number, language, and so on.

2. Explain MainFrame Window.

The mainframe window has the title bar and the menu bar. Various child windows,

including the toolbar window, the view window, and the status bar window, occupy the

mainframe window's client area.

3. How one can create a new menu items?

To create a menu, select menu from the Resource tab of the workspace pane and double

click on IDR_MAINFRAME. Now the menu bar dialog window appears. Double click on the

last menu space and enter main menu name as the caption in the properties dialog box. In the

same manner add submenus.

4. What is the use of keyboard accelerator?

This shortcut system is the standard Windows method of using the keyboard to choose

commands from menus. If you look at an application's menu resource script (or the menu

editor's properties dialog), you will see an ampersand (&) preceding the character that is

underlined in each of the application's menu items.


39

Exercise Number: 10 Title of the Exercise : DYNAMIC CONTROL



• To create a control using ATL wizard and use it in another application.




1 System 1

2 O/S Windows XP


b) Procedure:


1 Create a new project named MY_ATL from File->New and select

ATLCOMAppWizard then the next step select Dynamic Link

Library(DLL) and click finish.

2 In the class view, right click on MY_ATL class then select New ATL

Object, a window will appear. Select simple object and type TEST_ATL

in the short name field then click on Attributes tab then select aggregation

is no.

3 In the class view, expand the CTEST_ATL then right click on

ITEST_ATL then choose Add Method, a dialog will appear no add the

following methods

Method Name Parameters

add

sub

[in] long a,[in] long b,[out long *c

[in] long a,[in] long b,[out long *c

4 Edit the above methods and add code into it.

5 Now build the project (Don’t execute it)

/*COM PROJECT USING VB*/

1 Create a VB project named COM using Microsoft visual Basic 6.0. Select

Standard Exe project


40

2 Design the form window

as shown below

3 Create a Type Library for ATL COM Object from Project->References

then click browse, now select MY_ATL.dll which is present in the Debug

folder of MY_ATL project folder (dll file is generated only when we

build the project) and then click ok.

4 Now double click each button (click form icon), functions to be added for

each command button. Add codes to the respective as shown in the

coding.

5 Run the project from Run->Start

c) Program:

//TEST_ATL.cpp

CTEST_ATL::sub(long a, long b, long *c)

{ *c=a-b;

return S_OK; }

/*COM PROJECT USING VB*/

//COM.vbp

//general

Dim c As Long

Dim a As Long

Dim b As Long

Private Sub Command1_Click()

Dim obj As MY_ATLLib.TEST_ATL

Set obj = New TEST_ATL

a = Text1.Text

b = Text2.Text STDMETHODIMP CTEST_ATL::add(long a, long b, long *c)

{ *c=a+b;


41

return S_OK;

}

STDMETHODIMP

obj.Add a, b, c

MsgBox " a=" & a & " b=" & b & " a+b=" & c

End Sub


Dim obj As MY_ATLLib.TEST_ATL

Set obj = New TEST_ATL

a = Text1.Text

b = Text2.Text

obj.sub a, b, c

MsgBox " a=" & a & " b=" & b & " a-b=" & c

End Sub


End

End Sub

d) Output:

e) Result:



42

VIVA QUESTION AND ANSWER

1. What do you mean by COM?

The Component Object Model (COM) is the foundation of much of the new Microsoft

ActiveX technology. COM is an integral part of Programming Visual C++. COM is an

"industry-standard" software architecture supported by Microsoft, Digital Equipment

Corporation, and many other companies. It's by no means the only standard. Indeed, it

competes directly against other standards, such as CORBA from the Open Software

Foundation (OSF).

2. What are the features of COM?

COM provides a unified, expandable, object-oriented communications protocol for

Windows that already supports the following features:

A standard, language-independent way for a Win32 client EXE to load and call a

Win32 DLL. A general-purpose way for one EXE to control another EXE on the same

computer (the DDE replacement). A replacement for the VBX control, called an ActiveX

control. A powerful new way for application programs to interact with the operating system.

Expansion to accommodate new protocols such as Microsoft's OLE DB database

interface. The distributed COM (DCOM) that allows one EXE to communicate with another

EXE residing on a different computer, even if the computers use different microprocessor-

chip families.

3. What is a COM Interface?

COM objects have methods. Methods are grouped into interfaces and are called through

interface pointers. Interfaces exist to semantically bind together groups of related

methods.Prefacing interface names with a capital I for Interface is an almost universal COM

programming convention.

Microsoft has predefined more than 100 interfaces that any COM object can support.

These interfaces are called standard interfaces. User-defined interfaces such as IMath and

ISpelling are custom interfaces. COM objects can use standard interfaces, custom interfaces, or

a combination of the two. Every COM object implements an interface named IUnknown.

IUnknown contains just three methods:

QueryInterface - Returns a pointer to another interface, AddRef - Increments the object's

reference count, Release - Decrements the object's reference count


43

Exercise Number: 12 Title of the Exercise : CREATING DLL-REGULAR USING SHARED MFC DLL



• To create a DLL file and use the function of DLL in another EXE application.




1 System 1

2 O/S Windows XP


b) Procedure:


1 Create a project MyDll from File->New, select the MFCAppWizard(dll)

and the next step select Regular DLL using shared MFC DLL

2 In the class view tab on the workspace right click on MyDll classes and

choose New Class, a dialog will appear, now choose the class type as

Generic class and type the class name as CMyClass and press OK.

3 In the class view tab right click on CMyClass and select Add Member

Function

Function type Function Declaration

CString SayHello(CString

strName)

4 In the File view tab on the workspace, open the Header file folder and

double click on the “MyClass.h” and add “__declspec(dllexport) infront

of all functions that are used for external application.

5 In the File view tab on the workspace, open the MyClass.cpp from source

file folder and type the code.

6 Compile & Build the project

CREATING A NEW APPLICATION THAT USE THE DLL

1 Create a project named TestDll from File->New and select the

MFCAppwizard(exe) and the next step select Dialog based application


44

and accept the default values for the next step and finish it.

2 A dialog will appeared, now design the dialog window using controls just

look like as follows

3 Open class wizard from the view menu, click member variable tab and

choose IDC_EDIT1 and click add member variable and type as follows

Variable name Category CString

m_edit value CString

4 Double click the “OK” button on the dialog window, then the OnOk

function will be generated

5 In the file view tab on the work space window, open the “TestDllDlg.h”

to include “MyClass.h” and to declare object of that class and add the

codes to it #include “..\MyDll\MyClass.h”

6 Select the Project->Settings->Link and in the Object/library modules

enter a path to the DLL library file as follows

“..\MyDll\Debug\MyDll.lib”

7 Now copy the MyDll.dll file from MyDll\Debug folder and paste it into

the TestDll\Debug folder

8 Build and execute the project.

c) Program:

//MyClass.h

class CMyClass

{public:


45

__declspec(dllexport)CString SayHello(CString strName);

__declspec(dllexport)CMyClass();

__declspec(dllexport)virtual ~CMyClass();

};

//MyClass.cpp

CString CMyClass::SayHello(CString strName)

{ return "HAI "+strName;

}

TESTDLL

//TestDllDlg.h

#include "..\MyDll\MyClass.h"

class CTestDllDlg : public CDialog

{public:

CMyClass objMyClass;

CTestDllDlg(CWnd* pParent = NULL);

};

//TestDllDlg.cpp

void CTestDllDlg::OnOK()

{ UpdateData(true);

CString str=objMyClass.SayHello(m_strText);

AfxMessageBox(str);

CDialog::OnOK();

}

d) Output:

e) Result:



46


1. What is a DLL?

A DLL is a file on disk (usually with a DLL extension) consisting of global data,

compiled functions, and resources, which become part of your process. It is compiled to load at

a preferred base address, and if there's no conflict with other DLLs, the file gets mapped to the

same virtual address in your process.

The DLL has various exported functions, and the client program (the program that

loaded the DLL in the first place) imports those functions. Windows matches up the imports

and exports when it loads the DLL.

2. How the Client Program Finds a DLL.

If we link explicitly with LoadLibrary, you can specify the DLL's full pathname. If we

don't specify the pathname, or if you link implicitly, Windows follows this search sequence to

locate your DLL:

The directory containing the EXE file

The process's current directory

The Windows system directory

The Windows directory

The directories listed in the path environment variable

Here's a trap you can easily fall into. We build a DLL as one project, copy the DLL file

to the system directory, and then run the DLL from a client program. Next we rebuild the DLL

with some changes, but we forget to copy the DLL file to the system directory. The next time

we run the client program, it loads the old version of the DLL.

3. What are the different types of DLL?

AppWizard lets you build two kinds of DLLs with MFC library support:

a. extension DLLs and

b. regular DLLs.

4. Explain the extension DLL?

An extension DLL dynamically links to the code in the DLL version of the MFC library. An

extension DLL supports a C++ interface. When we build an MFC regular DLL, you can choose

to statically link or dynamically link to the MFC library. If we choose static linking, our DLL

will include a copy of all the MFC library code it needs and will thus be self-contained.


47

Exercise Number: 14 Title of the Exercise : DATA ACCESS THROUGH ODBC Date of the Exercise :


• To create a MFC Application for Database to store, retrieve, update student information like name, roll no, dept, mark1, mark2, and mark3 using ODBC.




1 System 1

2 O/S Windows XP


b) Procedure:


CREATING DATABASE

1 Create a database for the project in MSAccess from File->New and crea

blank database and save it then do the following

i. On the dialog appears in the window double click the

create table in design view

ii. Now type the fields like as follows and save the table

Name Text

RollNo Number

Dept Text

Mark1 Number

Mark2 Number

Mark3 Number

The table is shown, now specify the input or data for the fields

ACCESSING THE DATA

1 Create a project name ODBC using File->New and select

MFCAppWizard(exe) and the second step select Single Document and the

3rd step “Database view without File support and click the data source on


48

the same dialog box and then

Select in ODBC database name that we created and click OK and then

table name will be displayed on the window and select it click ok

2 Now accept the next default steps and the last step the AppWizard will

creates five classes for the project and click finish

3 Now design the dialog window using controls as follows

4 On the client area design a mark list for the student using the controls and

set the IDs

control (Edit control) IDs

Name

RollNo

Dept

Mark1

Mark2

Mark3

IDC_NAME

IDC_ROLLNO

IDC_DEPT

IDC_MARK1

IDC_MARK2

IDC_MARK3

5 Add member variable for the classes from view->class Wizard and select

the member variable tab on the dialog and do the following

i. Select the control IDs and click Add variable then a dialog appears

ii. In the new dialog, select the Member variable Name and the

variable type using the combo box.

Similarly do the above step for other control IDs.

6 The Member variables and its types are follows after finishing the

previous step.


49

Control IDs Type Member

IDC_DEPT

IDC_MARK1

IDC_MARK2

IDC_MARK3

IDC_NAME

IDC_ROLLNO

CString

int

int

int

CString

int

m_Dept

m_Mark1

m_Mark2

m_mark3

m_Name

m_RollNo

7 Set the IDs for the buttons using its properties(right click)

Control IDs Caption

ID_CLEAR

ID_ADD

ID_DELETE

ID_UPDATE

Clear

Add

Delete

Update

8 Now double click the buttons then corresponding handler are generated

and then add the codes to the corresponding handler

CONNECTING DATABASE TO OUR PROJECT

1 To make a connection of vc++ to MsAccess by following the steps.

i) From settings-> controlpanel-> Administrative tools->ODBC then a

dialog will appears.

ii) Click the add button on the dialog box then a dialog box appears, in

that select ”access drive to Microsoft access (*.mdb)” and click ok.

iii) Then type a data source named and click select button and select the

database name mdb file and click ok and next boxes also click ok.

2 Now the connection to access data from database was established.

3 Build and execute the program.

4 In the output client window, using the next and previous record button.

We can see the record and also using the button we can insert, delete and

update the records.

c) Program:

// CODBCView.CPP

void CODBCView::OnClear()

{ m_pSet->SetFieldNull(NULL);

UpdateData(FALSE);


50

}

void CODBCView::OnAdd()

{ m_pSet->AddNew();

UpdateData(TRUE);

if(m_pSet->CanUpdate())

{ m_pSet->Update(); }

if(m_pSet->IsEOF())

{ m_pSet->MoveLast(); }

m_pSet->Requery();

UpdateData(FALSE); }

void CODBCView::OnDelete()

{ CRecordsetStatus stat;

try { m_pSet->Delete(); }

catch(CDBException* e)

{ AfxMessageBox(e->m_strError);

e->Delete();

m_pSet->MoveFirst();

UpdateData(FALSE);

return; }

m_pSet->GetStatus(stat);

if(stat.m_lCurrentRecord==0)

{ m_pSet->MoveFirst(); }

else

{ m_pSet->MoveNext(); }

UpdateData(FALSE);

}

void CODBCView::OnUpdate()

{ m_pSet->Edit();

UpdateData(TRUE);

if(m_pSet->CanUpdate())

{ m_pSet->Update();

} }


51

d) Output:

e) Result:



1. Define ODBC?

The Microsoft Open Database Connectivity (ODBC) standard defines the rules of

SQL grammar and also the C-language programming interface to any SQL database. It's

now possible for a single compiled C or C++ program to access any DBMS that has an

ODBC driver.

2. Explain ODBC architecture.

ODBC's unique DLL-based architecture makes the system fully modular. A small

top-level DLL, ODBC32.DLL, defines the API. ODBC32.DLL loads database-specific

DLLs, known as drivers, during program execution.

3. What are the Recordset member functions? Open - Opens the recordset AddNew - Prepares to add a new record to the table Update - Completes an AddNew or Edit operation by saving the new or

edited 1. data in the data source

Delete - Deletes the current record from the recordset 4. What are the advantages of DBMS?

Use of standard file formats, Indexed file access, Data integrity safeguards, Multiuser access control.


52

Exercise Number: 15

Title of the Exercise : CREATING ACTIVEX CONTROL AND USING IT



• To create MFC Application for Active X Control Support.




1 System 1

2 O/S Windows XP


b) Procedure:


1 Create a project named ActiveXCtrl from File->New and select

MFCAppWizard (exe) and the next step select Single Document after that

accept the default values and finish it.

2 From the project menu select add to project->components and controls

open Registered ActiveX controls and select calendar controls 8.0, now

click the insert button.

3 The classwizard generates two classes for the project. The classes are

“CCalendar, COlefont” and click ok.

4 In the resource view tab on the workspace, right click on dialog and select

insert, a new dialog box appears.

5 In the dialog box, right click it and select the properties, change the ID as

“IDD_ACTIVEXDIALOG” and caption as “ActiveXDialog”.

6 Drag the calendar control from the control palette and place it into the

dialog box and design the dialog box as shown below.


53

7 By using the properties, change the ID and caption as follow

Control ID Caption

Calendar control

Selectdatebutton

Editcontrol

Editcontrol

Editcontrol

Nextweek button

IDC-

CALENDAR1

IDC-

SELECTDATE

IDC-DAY

IDC-MONTH

IDC-YEAR

IDC-NEXTWEEK

--

select date

--

--

--

nextweek

8 From the view classwizard, select “create a new class” and type the name

as CActiveXDialog and click ok.

9 In the classwizard from view menu, select the message maps and add the

message handler as follows, (double click the messages)

Object IDs Messages

CActiveXDialog

IDC_SELECTDATE

IDC_NEXTWEEK

IDC_CALENDAR1

ID_OK

WM_INITDIALOG

BN_CLICKED

BN_CLICKED

NewMonth

BN_CLICKED

10 Click on the classwizard from view menu and select member variable tab

and then add the member variable as follows. To add variable just select

the IDs and click add variable button.

IDs Member Category Variable


54

variable name Type

IDC_CALENDER

IDC_DAY

IDC_MONTH

IDC_YEAR

m_calender

m_sDay

m_sMonth

m_sYear

control

value

value

value

CCalendar

short

short

short

11 In the class view tab, on the workspace right click on CActiveXDialog

and choose add member variable as follows.

Variable Type Variable Name

unsigned long

COleVariant

m-BackColor

m-varValue

12 Open the ActiveXDialog.cpp file from the file view tab and open source

files and add the codes to it.

13 From the view ->ClassWizard, choose CActiveXCtrlView in class name

field and select CActiveXCtrlView in Object IDs and double click

WM_UTTONDOWN in the messages list box and click ok.

14 Open the AxtiveXCtrlView.cpp and add codes to OnLButtonDowm()

handler as follows and add #include “ActiveXDialog.h” at the top and

add the code to it.

15 Edit the OnDraw function and add code to it.

16 Build and execute the project.

c) Program:

// CActiveXCtrlView.cpp

void CActiveXCtrlView::OnDraw(CDC* pDC)

{ CActiveXCtrlDoc* pDoc = GetDocument();

ASSERT_VALID(pDoc);

pDC->TextOut(10,10,"press");

// TODO: add draw code for native data here

}

void CActiveXCtrlView::OnLButtonDown(UINT nFlags, CPoint point)

{ CActiveXDialog dlg;

dlg.m_BackColor=RGB(255,251,240);

COleDateTime today=COleDateTime::GetCurrentTime();


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dlg.m_VarValue=COleDateTime(today.GetYear(),today.GetMonth(),

today.GetDay(),0,0,0);

if(dlg.DoModal()==IDOK)

{ COleDateTime date(dlg.m_VarValue);

AfxMessageBox(date.Format("%B %d %Y"));

}

CView::OnLButtonDown(nFlags, point);

}

// CActiveXDialog.cpp

CActiveXDialog::CActiveXDialog(CWnd* pParent /*=NULL*/)

: CDialog(CActiveXDialog::IDD, pParent)

{ //{{AFX_DATA_INIT(CActiveXDialog)

m_sDay = 0;

m_sMonth = 0;

m_sYear = 0;

//}}AFX_DATA_INIT

m_BackColor=0x000000F;

}

BOOL CActiveXDialog::OnInitDialog()

{ CDialog::OnInitDialog();

m_calendar.SetValue(m_VarValue);

return TRUE; // return TRUE unless you set the focus to a control

}

void CActiveXDialog::OnNextweek()

{ m_calendar.NextWeek();

}

void CActiveXDialog::OnSelectdate()

{ CDataExchange dx(this,TRUE);

DDX_Text(&dx,IDC_DAY,m_sDay);

DDX_Text(&dx,IDC_MONTH,m_sMonth);

DDX_Text(&dx,IDC_YEAR,m_sYear);

m_calendar.SetDay(m_sDay);

m_calendar.SetMonth(m_sMonth);

m_calendar.SetYear(m_sYear);


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}

void CActiveXDialog::OnOK()

{ CDialog::OnOK();

m_VarValue=m_calendar.GetValue();

}

void CActiveXDialog::OnNewMonthCalendar1()

{

AfxMessageBox("Event for new month from ActiveXDialog::OnNewMonthCalandar1");

}

d) Output:

e) Result:


VIVA QUESTION AND ANSWER 1. What is an ActiveX control?

An ActiveX control is a software module that plugs into your C++ program the same

way a Windows control does. You can consider an ActiveX control to be a child window, just

as an ordinary control is. The most prominent ActiveX Controls features are properties and


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methods. ActiveX Controls (formerly known as OLE controls or OCXs) are the industrial-

strength replacement for VBXs based on Microsoft COM technology. Application developers

in both VB and Visual C++ 6.0 can use ActiveX controls.

2. Give the properties, methods and events in a calendar control.

The MSCal.ocx control is a popular Microsoft ActiveX Calendar control that's probably

already installed and registered on your computer. The Calendar control comes with a help file

that lists the control's properties, methods, and events.

Properties Methods Events

BackColor AboutBox AfterUpdate

Day NextDay BeforeUpdate

DayFont NextMonth Click

DayFontColor NextWeek DblClick

DayLength NextYear KeyDown

FirstDay PreviousDay KeyPress

Month PreviousMonth KeyUp

MonthLength PreviousWeek NewMonth

ShowDays PreviousYear NewYear

ShowTitle Refresh

TitleFont Today

3. How one can create an ActiveX control at runtime.

Insert the component into your project. ClassWizard will create the files for a wrapper

class.

Add an embedded ActiveX control wrapper class data member to your dialog class or

other C++ window class. In embedded C++ object is then constructed and destroyed

along with the window object.

Documents

MC9246-VISUAL PROGRAMMING LAB LABORATORY MANUAL