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Class (inherits from OLEObject)

Used to automate Microsoft Excel. Supported on the Windows platform only.

You will need to copy the MSOfficeAutomation plugin (located in the Extras folder of the installation) to the Plugins folder before you can use this class.


The language that you use to automate Microsoft Office applications is documented by Microsoft and numerous third-party books on Visual Basic for Applications (VBA). Microsoft Office applications provide online help for VBA. In Office 2007, click the Microsoft Office button and then click Options. Then select Popular and select the Show Developer Tab in the Ribbon checkbox.

You will then see a Visual Basic button in the Code group in the ribbon and menubar now includes a Help menu which leads to the VB online help.

To access the online help in Office 2003, choose Macros from the Tools Menu of your MS Office application, and then choose Visual Basic Editor from the Macros submenu. When the Visual Basic editor appears, choose Microsoft Visual Basic Help from the Help menu. The help is contextual in the sense that it provides information on automating the Office application from which you launched the Visual Basic editor.

If VBA Help does not appear, you will need to install the VBA help files. On Windows Office 2003, Office prompts you to install the VBA help files when you first request VBA help. You don't need the master CD.

Microsoft has additional information on VBA at http://msdn.microsoft.com/vbasic/ and have published their own language references on VBA. One of several third-party books on VBA is "VB & VBA in a Nutshell: The Language" by Paul Lomax (ISBN: 1-56592-358-8).

Sample Code

The following code transfers the information in a DesktopListBox to Excel and tells Excel to compute and format a column total. The code is in a DesktopButton's Pressed event handler and it assumes that a two-column DesktopListBox, ListBox1, is in the window. It contains the following data.

Item Price
Apples 1.77
Oranges 1.13
Bananas 0.40
Grapes 0.80
Var excel As New ExcelApplication
Var book As ExcelWorkbook
Var sheet As ExcelWorksheet

excel.Visible = True
book = excel.Workbooks.Add
excel.ActiveSheet.Name = "Expenses Report"
For i As Integer = 0 To ProduceList.ListCount - 1
excel.Range("A" + Str(i + 1), "A" + Str(i + 1)).Value = ProduceList.Cell(i, 0)
excel.Range("B" + Str(i + 1), "B" + Str(i + 1)).Value = ProduceList.Cell(i, 1)
excel.Range("A" + Str(ProduceList.ListCount + 1), "A"+ _
Str(ProduceList.ListCount + 1)).Value = "Total"
excel.Range("B1", "B" + Str(ProduceList.ListCount)).Style = "Currency"
excel.Range("B" + Str(ProduceList.ListCount + 1), "B"+ _
Str(ProduceList.ListCount + 1)).Value = "=SUM(B1:B" + _
Str(ProduceList.ListCount) + ")"

Exception err As OLEException

See Also

UserGuide:Office Automation Overview, Office, OLEException, OLEObject, PowerPointApplication, WordApplication classes.