FIX: Calling Method in User Ctrl w/ParamArray Causes Fatal Exception During Compile

View products that this article applies to.

This article was previously published under Q221225

SYMPTOMS

If no parameter is passed, a fatal exception occurs in Visual Basic 6.0 when you compile a project that calls a method in a user control with a ParamArray parameter.

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RESOLUTION

There is no workaround available for this problem. You must pass at least one parameter to avoid it.

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Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.

This bug was corrected in Visual Studio 6.0 Service Pack 3. For more information about Visual Studio service packs, please see the following articles in the Microsoft Knowledge Base:

194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why (http://support.microsoft.com/kb/194022/EN-US/ )

194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are Installed (http://support.microsoft.com/kb/194295/EN-US/ )

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MORE INFORMATION

Steps to Reproduce Behavior

Start a new ActiveX control project.

Add the following method:

Option Explicit

Public Function PassVararg (ParamArray t() As Variant) As Long
End Function

Compile the user control.
Start a new Standard EXE Project. Form1 is created by default.
Make a reference to the user control that you just created.
Place an instance of the user control on Form1.
Change the name of the user control to Ocx1.
In Form_Load event procedure, add the following code:
Dim k as Long k = Ocx1.PassVararg
Save the project.
Compile the project.

RESULT: A fatal exception occurs. This problem only occurs in an ActiveX control project. It does not happen in an ActiveX DLL project.