01 Introducing VBA

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MS ExcelVBA Programming

Introducing VBA


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Introducing VBA Programming

Visual Basic for Applications (VBA) aprogramming language that helps program,tweak, and squeeze productivity from Excel

Embedded in Excel OOP - object-oriented programming


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What Can You Do with VBA?

Inserting a text string Automating a task you perform frequently Automating repetitive operations (loops) Creating a custom command Creating a custom toolbar button

Creating a simplified front end Developing new worksheet functions Creating complete, macro-driven applications

Creating custom add-ins for Excel


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Advantages and Disadvantages of VBA

Advantages Disadvantages

Executes the task in exactly the same way

Learning how to write programs in VBA (language syntax, objects, props,)

Much faster than you could do itmanually

Other people who need to use your VBA programs must have their owncopies of Excel

Always performs the task withouterrors

Sometimes, things go wrong

Task can be performed by someone who doesnt know anything aboutExcel

VBA is a moving target

Can do things in Excel that areotherwise impossible


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VBA in a Nutshell (1)

You perform actions in VBA by writing (orrecording) code in a VBA module

A VBA module consists of Sub procedures(macros and/or UDFs)

VBA manipulates objects Objects are arranged in a hierarchy Objects of the same type form a collection You refer to an object by specifying its position

in the object hierarchy, using a dot as aseparator


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VBA in a Nutshell (2)

If you omit specific references, Excel uses theactive objects

Objects have properties and methods You refer to a property of an object by

combining the object name with the propertyname, separated by a period

You can assign values to variables VBA includes all the constructs of modern programming languages, including arrays andlooping


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Jumping Right In

Recording macro vs Using Excel built-in function (for paste special, values only)

Live view macro recording sample


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Visual Basic Editor (VBE)

Is connected, stillseparateapplication

Used to write, editand test code

Alt + F11


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Working with the Project Explorer

Each Excel workbook andadd- in thats openis a project

Ctrl + R


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Customizing the VBA Environment

Use the option in the Editor tab to control howcertain things work in the VBE


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Excel Object Model


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Excel Application Object

Addin object

CommandBar object

Window object

Workbook object

WorksheetFunction object


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Workbook object

Chart object

Name object

VBProject object

Window object

Worksheet object


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Collections of Objects

A collection is a group of objects of the sametype And a collection is itself an object !

Few examples of commonly used collections: Workbooks collection

Worksheets collectionCharts collectionSheets collection

collection names are all plural: Chart>Charts


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Referring to Objects (members of a collections)

Worksheets(Sheet1) by name Worksheets(1) by order


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Object Properties and Methods

In order to manipulate objects:

Read or modify an objects properties

Specify a method of action to be used with an

object


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Object properties

Every object has properties. Properties are attributes that describe the object,

determine how it looks, how it behaves, and even whether it is visible.

Using VBA, you can do two things with an

objects properties: Examine the current setting for a property Change the propertys setting


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Object methods

A method is an action you perform with anobject

Most methods also take one or more arguments. An argument is a value that further specifies theaction to perform.

Place the arguments for a method after themethod, separated by a space. Multiplearguments are separated by a comma.


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Object events

Objects respond to various events that occur For example, when youre working in Excel and you activate a different workbook, an Activateevent occurs

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01 Introducing VBA