Sep-05 Slide:1 VBA in Excel Walter Milner

Sep-05 Slide:2 VBA in Excel Introduction VBA = Visual Basic for Applications Enables end-user programming In MS Office applications Formulae and macros OK for simple actions, but.. Advantages over formulae and macros: –Multiple nested if is easy –Loops easy –Debugging easy

Sep-05 Slide:3 VBA in Excel Getting started View..Toolbars..Control

Sep-05 Slide:4 VBA in Excel Add a button Click the button button Drag on sheet to create one

Sep-05 Slide:5 VBA in Excel Format it Right click on button Select properties Set as required Note distinction between name and caption

Sep-05 Slide:6 VBA in Excel Program it Right click button Select View code:

Sep-05 Slide:7 VBA in Excel Test it On Control Toolbox, click set square This toggles run/design Click the button

Sep-05 Slide:8 VBA in Excel Referring to cells Private Sub CommandButton1_Click() Dim x As Integer Dim y As Integer Dim z As Integer Dim result As Integer x = Cells(1, 2).Value y = Cells(2, 2).Value z = Cells(3, 2).Value result = x * y + z Cells(4, 2).Value = result End Sub

Sep-05 Slide:9 VBA in Excel The VBA Excel Object model Hierarchy of classes Use to refer to things in an Excel application Very large number of classes, properties and methods Have to use on-screen help for reference

Sep-05 Slide:10 VBA in Excel The VBA Excel Object model Object is a thing Property is some property of an object Method is something the object can be told to do Event is something that can happen to the object Collection is a set of related objects Enumeration is action returning complete set of things (eg all fonts on system)

Sep-05 Slide:11 VBA in Excel Example object - Application

Sep-05 Slide:12 VBA in Excel Example properties of Application Program a button which sets a value for this property and see what happens Try it in a loop for a bizarre effect

Sep-05 Slide:13 VBA in Excel Example method Program a button which calls the findfile method of the application

Sep-05 Slide:14 VBA in Excel Example collection - Display the count property of the worksheets collection in a msgbox to show how many sheets there are in the workbook

Sep-05 Slide:15 VBA in Excel Using For Each.. Next in a collection Private Sub CommandButton4_Click() Dim w As Worksheet For Each w In Application.Worksheets MsgBox (w.Name) Next End Sub

Sep-05 Slide:16 VBA in Excel The RangeSelection property of the ActiveWindow This is a Range object So it has the properties of a Range object Use them to program a button which displays the total of the numbers in the cells selected

Sep-05 Slide:17 VBA in Excel 2d array exercise Use the RangeSelection property to program a button which does a vertical flip of selected cells