XL97: "Invalid Use of Null" Error Setting OnRepeat Method

• Microsoft Excel 97 for Windows

SYMPTOMS

When you run a macro that sets the Text and Procedure arguments for the OnRepeat method to Null in Microsoft Excel 97, you may receive the error:

   Run-time error '94':
   Invalid Use of Null

CAUSE

You cannot use Null for the parameters of the OnRepeat method as a valid means to reset the Repeat command. The Text and Procedure parameters require a String value.

RESOLUTION

Microsoft provides examples of Visual Basic for Applications procedures for illustration only, without warranty either expressed or implied, including, but not limited to the implied warranties of merchantability and/or fitness for a particular purpose. The Visual Basic procedures in this article are provided 'as is' and Microsoft does not guarantee that they can be used in all situations. While Microsoft support engineers can help explain the functionality of a particular macro, they will not modify these examples to provide added functionality, nor will they help you construct macros to meet your specific needs. If you have limited programming experience, you may want to consult one of the Microsoft Solution Providers. Solution Providers offer a wide range of fee-based services, including creating custom macros. For more information about Microsoft Solution Providers, call Microsoft Customer Information Service at (800) 426-9400.

In earlier versions of Microsoft Excel, you can set the parameters of the OnRepeat method to Null and not receive an error. If you set the OnRepeat argument to Null, you reset the action that occurs when the user selects the Repeat command on the Edit menu (or presses CTRL+y).

The following macro runs successfully in Microsoft Excel versions 5.0 and 7.0 but fails in Microsoft Excel 97:

Sub Test()

     MsgBox "Hello World!"

     'Reset the Repeat command
     Application.OnRepeat Text:=Null, Procedure:=Null

End Sub

Sub Test()

     MsgBox "Hello World!"

     'Reset the Repeat command
     Application.OnRepeat Text:="", Procedure:=""

End Sub

STATUS

This behavior is by design of Microsoft Excel 97.