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How To Create and Call an Excel Macro Programmatically from VB

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This article demonstrates how you can create a Microsoft Excel VBA macro programmatically from Microsoft Visual Basic, call it, and associate it with a toolbar button.

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More information

Follow the steps below to create the sample application:
  1. Create a Standard EXE project in Visual Basic. Form1 is created by default.
  2. Click References from the Project menu and check "Microsoft Visual Basic for Applications Extensibility."
  3. Add a CommandButton to Form1.
  4. Copy and paste the following code to the form's code window:
          Private Sub Command1_Click()
           ' Start Excel
           Dim xlapp As Object 'Excel.Application
           Set xlapp = CreateObject("Excel.Application")
           ' Make it visible...
           xlapp.Visible = True
           ' Add a new workbook
           Dim xlbook As Object 'Excel.Workbook
           Set xlbook = xlapp.Workbooks.Add
           ' Add a module
           Dim xlmodule As Object 'VBComponent
           Set xlmodule = xlbook.VBProject.VBComponents.Add(1) 'vbext_ct_StdModule
           ' Add a macro to the module...
           Dim strCode As String
           strCode = _
              "sub MyMacro()" & vbCr & _
              "   msgbox ""Inside generated macro!!!"" " & vbCr & _
              "end sub"
           xlmodule.CodeModule.AddFromString strCode
           ' Run the new macro!
           xlapp.Run "MyMacro"
           ' ** Create a new toolbar with a button to fire macro...
           ' Add a new toolbar...
           Dim cbs As Object 'CommandBars
           Dim cb As Object 'CommandBar
           Set cbs = xlapp.CommandBars
           Set cb = cbs.Add("MyCommandBar", 1, , True) '1=msoBarTop
           cb.Visible = True
           ' Make it visible & add a button...
           Dim cbc As Object 'CommandBarControl
           Set cbc = cb.Controls.Add(1) '1=msoControlButton
           ' Assign our button to our macro
           cbc.OnAction = "MyMacro"
           ' Set text...
           cbc.Caption = "Call MyMacro()"
           ' Set Face image...
           ' 51 = white hand
           ' 25 = glasses
           ' 34 = ink dipper
           ' etc...
           cbc.FaceId = 51
           ' Pause so you can inspect results...
           MsgBox "All done, click me to continue...", vbMsgBoxSetForeground
           ' Remember to release module
           Set xlmodule = Nothing
           ' Clean up
           xlbook.Saved = True
          End Sub
  5. Run the application. You should see Microsoft Excel launch, followed by a message box saying "Inside generated macro!!!." At this point, you are executing code inside your generated macro. Click OK to dismiss this dialog box and you should then see a dialog box reporting "All done, click me to continue." Leave this up, and switch to Excel. There should be a new toolbar visible, with a button with a white-hand icon. The Visual Basic code above associated this button with your macro, MyMacro(), via the OnAction property. When you click this button, MyMacro() gets called. Click it once to see it work. Click back to the form in Visual Basic and click OK on the "All done, click me to continue" message box.

Additional Notes for Office XP

Office XP applications have a security option to allow programmatic access to the VBA object model. If this setting is "off" (the default), you may receive an error running the sample code. For more information about this setting and how you can correct the error, see the following article in the Microsoft Knowledge Base:
282830 PRB: Programmatic Access to Office XP VBA Project Is Denied

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Keywords: KB194611, kbhowto, kbautomation

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Article Info
Article ID : 194611
Revision : 8
Created on : 1/23/2007
Published on : 1/23/2007
Exists online : False
Views : 479