Developing an Excel Applications

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Presentation transcript:

Developing an Excel Applications By Prof. H-M. Haav

For creating an application one needs Macros Modules Controls

Macros can be created in two ways: Recording plan actions you need to automate Tools>Record a new macro perform actions you need to automate stop recording Writing macros in VBA Tools>macros

Visual Basic for Applications VBA 1. Structure of Procedure (module) Sub name_of_program (parameters,…) <statements> ….. End sub

2. Reading data from active sheet variable = cell (reading one value) S = S=Range(“A1”) S=Range (“Start”) S=Cells(1,1) Cells(row index, column index) returns value of specified cell

2. Writing data to active sheet range = expression Cells(1,1) = 5 Range(“A1”) = “last name” Range (“Start”) = “last name” Cells(1,2) = SUM (B1:B7)

Naming ranges is useful for creating programs in VBA Sheets(“Sheet name”).Range(“Start”)

4. Dialog Boxes allow dialog with end-user of an application Sub computer (optional Year) Year =InputBox(“Input year of craetion of the first PC”) If Year = 1976 Then msg=“True!” Else msg=“False!” MsgBox msg End Sub

Objects and classes in Excel Application Command bars dialog Workbook(s) chart windows Chart objects Worksheet(s) Shape(s) Range

References to objects Workbooks(“BananaMadness.xls”) Worksheets(“Title Sheet”) Sheets(1) ActiveWorkbook.Sheets(3) Rows(3) Columns(1) Range(“Starts”).Cells (all cells in the range)

Properties of objects Object.[property] x=Range(“Starts”).value assigns variable x a value of range called Starts .ActiveSheet .ActiveCell .Selection Range(“Starts”).CurrentRegion …etc

Methods of objects Object.method[arguments] Worksheet(“Title Sheet”).Select Worksheet(“Title Sheet”).Activate Worksheet(“Title Sheet”).Calculate Worksheet(“Title Sheet”).Delete Range(“Starts”).Clear …etc

Controls Button Radio button Combo box To create a control turn on Forms toolbar select the control drag the control to needed area define properties

Assign macro to a control select the control on Tools menu, click Assign Macro enter or choose the name of your existing macro

Examples of recorded macros Sub TotalBonus() Range("I7").Select ActiveCell.FormulaR1C1 = "=SUM(RC[-2]:RC[-1])" Selection.AutoFill Destination:=Range("I7:I10"), Type:=xlFillDefault Range("I7:I10").Select Selection.Style = "Currency" End Sub