Empezando Con Map Objet

8/3/2019 Empezando Con Map Objet

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Getting Started with MapObjectsContents Introduction 5

Loading MapObjects 6

Getting help 6

Adding a map 7

Adding pan and zoom controls 9

Adding a toolbar 11

Creating a find tool 14

Handling resize 16

Displaying map layers based on scale 17

Adding a spatial query tool 18

Statistical mapping 20

Event tracking 21

Working with DataConnection objects 24

Working with ImageLayer objects 25

Congratulations 27


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Getting StartedIN THIS BOOK

Loading MapObjects into Visual

Basic

Adding simple display tools

Creating basic spatial query

tools

Displaying map layers

Tracking events

Working with theDataConnection object

Adding an image layer

In this introductory document you will use MapObjects and Microsoft

Visual Basic to build an application that uses maps. Along the way you

will learn how to:Display a map with multiple layers.

Control panning and zooming.

Create a toolbar control.

Display map layers based on scale.

Perform spatial and logical queries.

Draw simple graphics on the map.

Display features with thematic renderers.

Dynamically display real-time data with an event tracking layer.

Programmatically add data to a map.

Note If you accepted the defaults when installing MapObjects, thegeographic data that this tutorial refers to can be found in C:\ProgramFiles\ESRI\MapObjects2\Samples\Data\Usa. The bitmaps you can use arein the Samples\Bitmaps folder.

GETTING STARTEDWITH MAPOBJECTSUSING VISUAL BASIC 2


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Getting help

The MapObjects online help system is integrated with theVisual Basic Object Browser.

1. Click Symbol in the Classes/Modules list.

2. Click Rotation in the Methods/Properties list.

3. Click the help (question mark) button.

The help system provides help for every object,property, method, event and constant inMapObjects. In addition to the Object Browser,the help system is accessible form the VisualBasic Code window. Simply type in the name of

an object, property, method, event or constant,and press F1.

Adding a mapThe Map control is the object you use to display maps.

Add the Map control to the form

1. Double-click the Map control button in the Toolbox to add a new map to

the form.

2. Resize the map to fill the form.

Select the data to display on the map

You can specify the data that is displayed in the map by setting propertiesin the Map controls property sheet.

1. Right-click the mouse on the map to display the context menu.

2. Choose Properties to display the property sheet.

3. Click the Add button and locate the folder containing the States sampledata. If you selected the defaults when you installed MapObjects, this

will be in c:\Program Files\ ESRI\MapObjects2\Samples\Data.



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4. Click the States.shp file and then click Open.

5. Add the file USHigh.shp in the same manner.

Set properties for the layers

1. Click the States layer in the Layers list and then click

Properties.

2. Click the Color button to select a color for the States

layer.3. Click OK to close the dialog.

4. Select a color for the USHigh layer in the same manner.

5. Click OK to close the property sheet.

Save the project1. Click the File menu and then click Save Project.

2. Browse to a suitable folder, then in the File Name box type

StarterMap.frm.

3. Click Save.

4. In the second Save dialog, type StarterMap.vbp in the File Name box.

5. Click Save.

Run



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Test your application

1. Click the Run button in the Visual Basic toolbar.

Stop

2. To stop running your application and return to design

mode, click the Stop button in the Visual Basic toolbar.

Adding pan and zoom controlsAt this point your application can display the map at its fullextent. In this section you will add some simple pan andzoom controls that your application will activate inresponse to mouse clicks inside the map. You will writesome code that the application will execute in response tothe MouseDown event on the map.

Respond to the MouseDown event

1. Double-click the map to display the Visual Basic Code

window.

2. Add code to Map1s MouseDown procedure.

Private Sub Map1_MouseDown(Button As Integer, _Shift As Integer, x As Single, y As Single)

Set Map1.Extent = Map1.TrackRectangle

End Sub

Test your change


2. Click the map with the left mouse button and drag out a rectangle.

3. Release the mouse button and notice that the map is redrawn at the

location you specified.

TrackRectangle is a method that applies to a map. It tracks themovement of the mouse while the user presses the mousebutton, rubber-banding a rectangle at the same time. When theuser releases the mouse button, the TrackRectangle methodreturns a Rectangle object that the application assigns into theExtent property of the map, causing the map to be redrawnwith a new map extent.

4. Click the stop button in Visual Basic to return to design mode.



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Add panning


window again.

2. Change the code for the MouseDown event.

Private Sub Map1_MouseDown(Button As Integer,_Shift As Integer, x As Single, y As Single)

If Button = vbLeftButton Then


Elseif Button = vbRightButton then

Map1.Pan

End If

End Sub

If the Button parameter is equal to vbLeftButton when theMouseDown event occurs, then the zooming code from the

previous step will be executed. Otherwise, the code willcall another map method, Pan. If the user clicks the leftmouse button, the Button parameter will be vbLeftButton.If the user clicks the right mouse button, the value ofButton will be vbRightButton.

Add a FullExtent button

Your application now supports panning and zooming, butonce the user has zoomed into the map, there is no way toget back to the full extent again. In this section you willadd a button to the form that zooms the map to the fullextent.

1. Double-click the CommandButton button in the Toolbox

to add a button to the form.

2. Move the button to the upper right of the form.

3. Press F4 to display the Properties window.

4. Click in the Caption box and type Full Extent to change the buttons

caption.5. Resize the Map control so that it is not obscured by the button.

6. Double-click the Full Extent button to display the Code window.

7. Add code for the Click event.

Private Sub Command1_Click()

Set Map1.Extent = Map1.FullExtent

End Sub

The FullExtent property of the map returns a Rectangle object thatdefines the bounding box of all the layers of the map.

Test your change


2. Click the map with the left mouse button and drag out a rectangle.

3. Release the mouse button to redraw the map.



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4. Click the map with the right mouse button and drag to

pan the map.

5. Release the mouse button to redraw the map.

6. Click the Full Extent button to redraw the map at the full

extent.

Save the project

1. Click the Stop button in the Visual Basic toolbar to return

to design mode.

2. Click the Save Project button in the Visual Basic toolbar

to save your changes.

Adding a toolbarYour applications pan and zoom capabilities are somewhathidden from the user. In this section you will create atoolbar with pan and zoom buttons.

Adding a toolbar

Visual Basic includes a toolbar control that can be used inconjunction with an ImageList control to display acollection of buttons at the top of a form.

1. Delete the Full Extent button from the form.

2. Double-click the Toolbox, and select MS Windows

Common Controls. You will notice new tools are added

to your Toolbox.

3. Double-click the Toolbar button in the Toolbox to add a

Toolbar control to the form.

4. Double-click the ImageList button in the Toolbox to add

an ImageList to the form.

5. Resize the map so that it is not obscured by the toolbar.

The ImageList control may obscure the map; however, this is not aproblem because the ImageList control will not be visible when yourapplication is running.

Adding images to the ImageList control

1. Right-click the ImageList control to display the context menu.

2. Click Properties to display the property sheet.

3. Click the Images tab.

4. Click Insert Picture and locate the folder that contains the sample

bitmaps.

5. Click the Zoom.bmp file and then click Open.

6. Add the files Pan.bmp, Globe.bmp, Bex.bmp, and Pennant.bmp in the

same manner.



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Set the MaskColor of the ImageListSetting the MaskColor property of an ImageList controlspecifies a color that will act as a mask for any imagescontained by the control. The mask color will not be drawn,resulting in an image with a transparent background.

1. Click the Colors tab.

2. In the Properties list, click the arrow and then click

MaskColor.

3. Click Dark Cyan in the Color Palette list.

4. Click OK to dismiss the property sheet.

Associate the ImageList with the toolbar

You can associate the Toolbar control with an ImageList control toprovide the graphic images for the buttons.

1. Right-click the Toolbar control to display the context menu.

2. Click Properties to display the property sheet.

3. In the ImageList box, click the arrow and then click ImageList1. This

associates the toolbar with the ImageList control.

Adding buttons to the Toolbar control

In this section you will add five buttons and a separator to the toolbar.You will set the Style of two buttons to Placeholder. The Placeholderswill be used later in this document.

1. In the Toolbar Control Properties dialog click the Buttons tab, then click

Insert Button.

2. Set the buttons style to Button Group, its Image to 1, and its Value to

Pressed.

3. Add a second button and set its Style to Button Group and its Image to2.



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4. Add a third button and set its Style to Placeholder.

5. Add a fourth button and set its Style to Placeholder.

6. Add a fifth button and set its Style to Separator.

7. Add a sixth button and set its Image to 3.


Change the MouseDown event


window.

2. Modify the code attached to Map1s MouseDown

procedure.


If Toolbar1.Buttons(1).Value = 1 Then


ElseIf Toolbar1.Buttons(2).Value = 1 ThenMap1.Pan

End If

End Sub

Selecting the first button in the toolbar sets the mouse to be a zoom tool;selecting the second button lets you use the mouse to pan.

Implement the FullExtent buttonIn this section you will reimplement the Full Extent button that youdeleted.

1. Double-click the toolbar to display the Code window.

2. Add code to Toolbar1s ButtonClick event.

Private Sub Toolbar1_ButtonClick(ByVal Button _As MSComctLib.Button)

If Button.Index = 6 ThenSet Map1.Extent = Map1.FullExtent

End If

End Sub

The ButtonClick event is generated whenever a click occurs on a buttonin the toolbar. If the index of the button is 6, then the map is zoomed toits full extent.



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Test your changes


2. Click somewhere on the map and drag a rectangle to

zoom in.

3. Click the pan button in your applications toolbar.

4. Click somewhere on the map and then drag to pan.

5. Click on the full extent button (the globe) in your

applications toolbar to draw the map at its full extent.

Save your changes

1. Click the Stop button in the Visual Basic toolbar to return

to design mode.

2. Click the Save Project button in the Visual Basic toolbar

to save your changes.

Creating a find toolIn this section you will add additional controls to your application toimplement a simple function for locating a state by name.

Add controls to the form1. Double-click the Label button in the Toolbox to add a label to the form.

2. Reposition the label in the lower left corner of the form.

3. Display the Properties window by pressing F4, and set the caption of

the label to be State:.

4. Double-click the TextBox button in the Toolbox to add a TextBox to the

form, and position it next to the label.

5. Clear the Text property of the TextBox using the Properties window.

6. Resize the map so that it is not obscured by the new controls.



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Attach code to the TextBox

You will use the text the user types into the TextBox toperform a logical query.

1. Double-click the TextBox to show the Code window.

2. Add code to Text1s KeyPress procedure, by selectingKeyPress from the right hand drop down list:

Private Sub Text1_KeyPress(KeyAscii As Integer)

If KeyAscii = vbKeyReturn Then

Dim recs As MapObjects2.Recordset

Dim shp As Object

Dim rect As MapObjects2.Rectangle

Dim exp As String

build a search expression

exp = STATE_NAME = & Text1.Text &

perform the search

Set recs = Map1.Layers(States). _SearchExpression(exp)

show the results, if any

If Not recs.EOF Then

Set shp = recs.Fields(Shape).Value

Set rect = shp.Extent

rect.ScaleRectangle 2

Set Map1.Extent = rect zoom to state

Map1.Refresh force redraw of the map

Map1.FlashShape shp, 3 flash the state

End If

End IfEnd Sub

The code first builds a simple SQL query expression using thevalue of the TextBoxs Text property, then searches the Stateslayer using the SearchExpression method; the result is aRecordset object. If the value of the Recordsets EOF property

is False, the code positions Recordset on the first record thatsatisfies the search expression. In that case, the code gets thevalue of the Shape field for the first record. The code scalesthe Extent of the shape and then sets it to be the extent of themap. The code then redraws the map explicitly, using theRefresh method; and finally, flashes the shape three times.

Test your changes

1. Run your application.2. Type the name of a state, e.g. Vermont, into the TextBox.

3. Press the Enter key.



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4. When you are finished running your application, click the

Stop button in the Visual Basic toolbar.

Handling Resize

When you run your application and resize the form, youwill notice that the map is not automatically resized.

Respond to the Resize event

1. Double-click the form to display the Code window.

2. Add code to the forms Resize procedure, by selecting

Resize from the right-hand drop down list:

Private Sub Form_Resize()

y coordinate of the find controls

Dim yFind As Integer

a constant spacing

Dim space As Integer

space = Text1.Top - (Map1.Top + Map1.Height)

yFind = ScaleHeight - Text1.Height - space

move the controls that make up the find tool

Label1.Move Label1.Left, yFind

Text1.Move Text1.Left, yFind

move the map itself

Dim mapTop As Integer

mapTop = Toolbar1.Top + Toolbar1.Height

Map1.Move 0, mapTop, ScaleWidth, _yFind - space - mapTop

End Sub

When the user resizes the form, the code resizes the controlsusing the Move method.Notice that when you run your application, it draws the maptwice initially. This is due to the fact that controls on the formare initially displayed using the size and position specifiedduring design time. To fix this problem, you will resize thecontrol when the form is initialized. You have already writtenthe code to resize the controls, you just need to call theprocedure.

3. Double-click the form to show the Code window.

4. Add code to the forms Initialize procedure.

Private Sub Form_Initialize()Form_Resize

End Sub



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Displaying map layers based on scaleIn this section you will add a new layer to your map and add code thatcontrols whether or not that layer is visible at a given time.

Add another layer

1. Right-click the map to display the context menu. Click Properties to

show the property sheet.

2. Click the Add button and locate the folder where the sample data is

stored.

3. Click the Counties.shp file and then click Open.

4. Click the Counties layer in the list to select it.

5. Click the down arrow to move the Counties layer below the USHighlayer.

6. Click Properties to change the color of the Counties layer.

7. Click OK to dismiss the Layer Properties dialog.


If you run your application now you will notice that it displays everycounty in the United States. At the full extent, there is no need to displaythat much detail, so in response to the BeforeLayerDraw event, you will

selectively make the Counties and States layers visible or invisible,depending on the current extent of the map.

Respond to the BeforeLayerDraw event

1. Double-click the map control to display the Code window.

2. Add code to Map1s BeforeLayerDraw procedure:

Private Sub Map1_BeforeLayerDraw(ByVal index _As Integer, ByVal hDC As stdole.OLE_HANDLE)



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Adding a spatial query toolIn this section you will add a new tool to the toolbar thatwill perform spatial queries on the map. You will add codeto your application that will draw the results of the spatialquery on the map.

Add a new button to the toolbar

1. Right-click the toolbar to display the context menu. Click

Properties to show the property sheet.

2. Click the Buttons tab.

3. Click the right arrow twice to change the Index to 3.

4. Change the buttons Style to Button Group, and its

Image to 4.


Add a variable to the form


2. In the General section, declare a variable that will be the

results of the spatial query. The type of the variable will

be a Recordset.

Dim gSel As MapObjects2.Recordset

It is necessary to completely qualify the Recordset typewith MapObjects in order to avoid a name conflict withVisual Basics built-in Recordset type.

Implement the query tool

Modify Map1s MouseDown procedure.



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zoom



pan

ElseIf Toolbar1.Buttons(2).Value = 1 Then

Map1.Pan

spatial query


Dim p As MapObjects2.Point


Set p = Map1.ToMapPoint(x, y)

search for a highway

Set recs = Map1.Layers(USHigh). _SearchByDistance(p, Map1. _ToMapDistance(100), )

nothing is found

If recs.EOF Then

Set gSel = Nothing counties that intersect highways

Else

Set gSel = Map1.Layers(Counties). _SearchShape(recs).Fields(Shape). _Value, moEdgeTouchOrAreaIntersect, )

End If

trigger a redraw of the map

Map1.RefreshEnd If

End Sub

When the current tool is the spatial query tool, two searchesare performed. The first search is a point proximity search onthe USHigh layer. The code obtains the point by converting

the X and Y coordinates of the event, which are in controlunits, into map units. If the first search is successful, the codeuses the highway it found as the input to the second search thatit performs on the Counties layer. The code stores the result ofthe second search in the variable named gSel.

Draw the results1. Modify Map1s AfterLayerDraw procedure.

2. Add code to display the results of the query on top of the Counties

layer.

Private Sub Map1_AfterLayerDraw(ByVal index _As Integer, ByVal canceled As Boolean, ByVal _hDC As stdole.OLE_HANDLE)

If index = 1 Then countiesIf Not gSel Is Nothing Then

Dim sym as New MapObjects2.Symbol

sym.Color = moYellow

Map1.DrawShape gSel, sym

End If

End If

End Sub



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Test your changes

1. Run your application and zoom into an area so that the

Counties layer becomes visible.

2. Click the spatial query tool, then click on a highway.

3. Click the Stop button in the Visual Basic toolbar.

4. Click the Save Project button to save your changes.

Statistical mappingIn this section youwill modify your application so that itdraws the Counties layer using the underlying attribute

information.

Attach a renderer to the Counties layer

Each MapLayer object has a Renderer property. A Renderer objectcontrols how MapObjects draws a MapLayer. You can use theClassBreaksRenderer to display continuous data, in this case, the numberof mobile homes per capita by county.


2. Add code to the Load procedure for the Form.

Private Sub Form_Load()

counties layer

Dim rC as New MapObjects2.ClassBreaksRenderer

Set Map1.Layers(Counties).Renderer = rC

rC.Field = MOBILEHOMESet stats = Map1.Layers(Counties).Records _.CalculateStatistics(MOBILEHOME)

calculate breaks away from the mean,

only add breaks within the range of values

Dim breakVal As Double

breakVal = stats.Mean - (stats.StdDev * 3)

For i = 0 To 6If breakVal >= stats.Min And _breakVal


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Attach a renderer to the States layer

1. Modify the forms Load procedure.

2. Append this code at the end of the form's Load

procedure.

states layer

Dim rS as New MapObjects2.DotDensityRenderer

Set Map1.Layers(States).Renderer = rS

rS.Field = HOUSEHOLDS

Set stats = Map1.Layers(States).Records. _CalculateStatistics(HOUSEHOLDS)

rS.DotValue = stats.Max / 40

Test your changes

1. Run your application and look at the States layer. Notice

that the application draws polygons with dots that

indicate the number of households.

2. Zoom into an area so that the Counties layer becomes visible. Notice

that the application now draws the counties in different colors,

depending on the underlying attribute values.



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4. Click the Save Project button to save your changes.

Event trackingSome applications must display geographic entities on topof the map, especially if those entities have a tendency to

move. For example, a vehicle tracking system would wantto display vehicles on the map at the appropriate locationsand update those locations over time, without redrawing allthe layers of the map each time a vehicle changes location.

In this section, you will add an event tracking layer to yourapplication to facilitate this requirement.

Add an event tool to your applications

toolbar1. Right-click the toolbar to display the context menu. Click

Properties to show the property sheet.

2. Click the Buttons tab.

3. Click the right arrow three times so that the Index displayed is 4.

4. Change the buttons Style to Button Group, and its image to 5.

5. Click OK to dismiss the property sheet. Your toolbar should now have

five buttons, as shown below.

Implement the event tool

1. Double-click the map to display the Code window.

2. Change Map1s MouseDown procedure.



zoom

Map1.Extent = Map1.TrackRectangle


pan

Map1.Pan


spatial query

Dim p As MapObjects2.Point

Dim tol As Double


Set p = Map1.ToMapPoint(x, y)

Set tol = Map1.ToMapDistance(100)



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search for a highway within the tolerance

Set recs = Map1.Layers(USHigh). _SearchByDistance(p, tol, )

If recs.EOF Then nothing is found

Set gSel = Nothing

Else

counties that intersect the highways

Set gSel = Map1.Layers(Counties). _SearchShape(recs.Fields(Shape).Value, _moEdgeTouchOrAreaIntersect, )

End If

trigger a redraw of the map

Map1.Refresh

ElseIf Toolbar1.Buttons(4).Value = 1 Then add an event

Dim pt as MapObjects2.Point

Set pt = Map1.ToMapPoint(x, y)

With Map1.TrackingLayer.Symbol(0)

.SymbolType = moPointSymbol

.Size = 4

.Style = moSquareMarker

End With

Map1.TrackingLayer.AddEvent pt, 0

End If

End Sub

Test the event tool

1. Run your application.

2. Zoom into an area.

3. Click the event tool, then click in the map to add events.


Add a timer to your form

To trigger the movement of the events, a Timer control will be used.

1. Double-click the Timer button in the Toolbox to add a timer to the form.

The Timer control will not be visible when your application is running.

2. Double-click the timer to display the Code window.

3. Add code to the timer procedure.

Private Sub Timer1_Timer()

Dim maxDist As Double

Dim nEventCount As Integer

maxDist = Map1.Extent.Width / 20

nEventCount = Map1.TrackingLayer.EventCount



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For iIndex = 0 To nEventCount - 1

Set gEvt = Map1.TrackingLayer.Event(iIndex)

move each event randomly

gEvt.Move maxDist * (Rnd - 0.5), _maxDist * (Rnd - 0.5)

Next iIndex

End Sub

Add a CheckBox to your form

To control the timer, you will add a CheckBox control toyour application.

1. Double-click the CheckBox button in the Toolbox to add

a CheckBox to the form.

2. Move the CheckBox to the lower right corner of the form.

3. Open the Properties window and set the Caption to Data

collection.

4. Double-click the CheckBox control to open the Code

window.

5. Add code to Check1s Click procedure.

Private Sub Check1_Click()Timer1.Interval = Check1.Value * 500

End Sub

Test your changes

1. Run your application.

2. Zoom into an area.

3. Click the event tool, then click in the map to add events.

4. Click the Data collection check box. Notice that the events start movingrandomly on top of the map.

5. Click the check box again to stop the events.

Working with DataConnection objectsIn each of the previous sections, you have worked with MapLayer objectsthat were specified interactively using the Map controls property sheet.

In this section, you will add code to your application that createsMapLayer objects programmatically using a DataConnection object.

Remove the existing layers



3. Click on the Ushigh layer, then click Remove to delete the layer.

4. Remove Counties and States in the same manner, then click OK.

Add a procedure that will initialize the map


2. In the General section, declare a procedure.



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Sub InitializeMap()

Dim dc As New DataConnection

Dim layer As MapLayer

dc.Database = C:\Program Files\ESRI\ _MapObjects2\Samples\Data\USA

If dc.Connect Then

Set layer = New MapLayer

layer.GeoDataset = dc.FindGeoDataset(States)

layer.Symbol.Color = moPaleYellow

Map1.Layers.Add layer


layer.GeoDataset =dc.FindGeoDataset(Counties)

Map1.Layers.Add layer


layer.GeoDataset = dc.FindGeoDataset(USHigh)

layer.Symbol.Color = moRedMap1.Layers.Add layer

Else

MsgBox The data could not be located.

End exit the application

End If

End Sub

3. Add a call to your procedure in the Forms Load procedure.


InitializeMap

4 Run your application to test the changes. The map should appear as

before, but the colors of the MapLayers are specified in the code, and

may be different to the colors you selected in the Layer Properties

dialog box.

Working with ImageLayer objects

In each of the previous sections, you have worked with MapLayer objectsbased upon vector data sources. In this section, you will see how to addlayers to your map that are based on images. MapObjects allows you touse a wide range of image types as ImageLayers, including such commonimage types as windows bitmaps (.bmp), tagged image file format (.tiff),and CompuServe bitmaps (.gif). For a full, up-to-date list of the imageformats you can use in a map, see "Supported Image Formats" in the"Using MapObjects" section of the online help.

Add a new form to your project

1. Right-click on the StarterMap project in the Project Explorer.

2. From the context menu, choose Add and then choose Form.



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3. In the Add Form dialog box, choose Form.

A new Form called Form1 should now be added to your

project.

4. Add a Map to the new form by double-clicking the Map

control in the Visual Basic toolbox.

5. Resize the Map to fill the form.

Save the new form

1. From the File menu, choose save.

2. In the File Name box type ImageLayer.frm.

3. Click Save.

Set the new form as the Startup object

Before you run your project, you must specify that the new form shouldbe the Startup Object. A form specified as the Startup Object is loaded assoon as the project is run.

1. Right-click on the StarterMap project in the Project Explorer.

2. From the context menu, choose StarterMap Properties.

3. Select Form2 from the Startup Object combo box.

4. Click OK.

Select an image layer to display on the map

You can specify an image to display as an ImageLayer by settingproperties in the Map controls property sheet.



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1. Right-click the mouse on the map to display the context

menu.


3. Click the Add button, and then select "All supported

Image formats" from the "Files of type" combo box.

4. Navigate to the Washington sample data folder.

5. Click the Wash.bmp file and then click Open.

6. Click Add again and then choose the Roads shapefile.

Test your changes




Adding an ImageLayer in code

Previously, you added a MapLayer programmatically, using theDataConnection object. Now you will add an ImageLayer

programmatically. To do this, you use the File property of theImageLayer object.

Remove the existing layers



3. Select Wash.bmp, then click Remove to delete the layer.

4. Select Roads, then click Remove.

5. Click OK.

Add a procedure that will initialize the map


2. In the Form_Load section, add the code:


Dim imgLayer As New MapObjects2.ImageLayer

imgLayer.File = "C:\Program Files\ESRI\ _MapObjects2\Samples\Data\Washington\Wash.bmp"

If imgLayer.Valid Then

Map1.Layers.Add imgLayer

Else

MsgBox "Could not load Image"

End If

End Sub



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Test your changes




CongratulationsYou have built a simple application with MapObjects.Although these exercises showed you many of thecapabilities of MapObjects, there is lots more to discover.To learn more, read the book named Building Applicationswith MapObjects, consult the MapObjects ProgrammersReference, or use the MapObjects online help for the most

up-to-date information.


Documents

Empezando Con Map Objet