1 Overview Introduction to VBA The Visual Basic Editor (VBE) –First Program Getting Started with VBA –Subroutines –Declaring variables –Input boxes and.

1

Overview

• Introduction to VBA

• The Visual Basic Editor (VBE)– First Program

• Getting Started with VBA– Subroutines– Declaring variables– Input boxes and Message boxes– With construction

2

Introduction to the VBA

• VBA, Visual Basic for Applications, is an implementation of Microsoft's Visual Basic, an event driven programming language and associated integrated development environment (IDE) which is built into most Microsoft Office applications .

• However, VBA and VB are not the same.– Similar in programming elements

– VBA is the language to manipulate Excel (and other applications).

3

Visual Basic Editor

• Visual Basic Editor (VBE) is the Integrated Development Environment (IDE) for programming with VBA.

• It can be accessed by pressing [Alt] + [F11]

• Code window

• Project explorer, Properties window, (just like IDE for VB.Net)

4

VBE

5

First Program

• Open “FirstProgram.xls” downloaded from Web site.

• Press [Alt] + [F11]

6

FirstProgram (cont.)

• Insert a module to the project

• Start typing Sub CountHighSalesand hit [Enter]

• You will see a Subroutine block is inserted automatically.

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FirstProgram (cont.)

• Type the rest of the syntax in the module:Dim i As IntegerDim j As IntegerDim numberHigh As IntegerDim salesCutoff As Currency

salesCutoff = InputBox("What sales value do you want to check for?")For j = 1 To 6 numberHigh = 0 For i = 1 To 36 If Range("SalesRange").Cells(i, j) >= salesCutoff Then _ numberHigh = numberHigh + 1 Next i

MsgBox "For region " & j & ", sales were above " & _ Format(salesCutoff, "$0,000") & " on " & numberHigh & " of the 36 months."Next j

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FirstProgram (cont.)

• Run the program from the VBE

• Run -> Run Sub/USerForm

• F5• or

• Type in a number in the InputBox, such as 150000.

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FirstProgram (cont.)

• Run the program with a button– Right click tool bar and

choose “Form” tool bar

– Drag button form in somewhere on the right side of the data

– Choose the macro you just created

– Change the name as appropriate

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Subroutines

Sub CountHighSales()

End Sub

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Declaring variables

Dim i As Integer

Dim j As Integer

Dim numberHigh As Integer

Dim salesCutoff As Currency

• Option Explicit – need to declare variables before you can use it

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Input boxes and Message boxes

• InputBox(“prompt”, “title”) – returns user’s input as data

• MsgBox “Prompt”, type, “title”– vbInformation – information display– vbYesNo – display information and Yes and

No buttons; returns vbYes or vbNo– vbExplanation, etc.

• Require parentheses if the box captures the result (input or yes/no answer)

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With construction

• Properties are described top down, separated by “.” (period)

e.g., Workboolks(“Sales”).Woksheets(“March”).Range(“A1”).ValueWorkboolks(“Sales”).Woksheets(“March”).Range(“A1”).Font.NameWorkboolks(“Sales”).Woksheets(“March”).Range(“A1”).Font.Size

• Using “With” key word, it may be structured without repeating the same.With Workboolks(“Sales”).Woksheets(“March”).Range(“A1”)

.Value = “Sales for march”With .Font .Name = “Times New Roman” .Size = 14

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Exercise

• The file ExamScores.xls contains scores for an exam in the range A1:A100.

• Write a program that reports the average, standard deviation, minimum, and maximum of the scores in a message box.

• Range is set in a module already.• Use Excel’s functions (with Application.WorksheetFunction. )