DOCUMENT:Q187633  12-JUN-1998  [vbwin]
TITLE   :BUG: Type Mismatch Referencing UserControl on Unloaded Form
PRODUCT :Microsoft Visual Basic for Windows
PROD/VER:WINDOWS:5.0
OPER/SYS:WINDOWS
KEYWORDS:

======================================================================
---------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Visual Basic Learning, Professional, and Enterprise Editions
   for Windows, version 5.0
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SYMPTOMS
========

If you attempt to set an object variable referencing a UserControl on an
unloaded form, and the UserControl resides in the same project as the
Module containing the declaration, a TypeMismatch error occurs. This
problem does not occur if the form is loaded, if the UserControl is in a
different project, or if the code is placed in the Load Event of the Form
containing the UserControl.

RESOLUTION
==========

 - Load the Form before referencing the UserControl. For example:

      Sub Main()
         Load Form1
         Dim ctlMyControl as UserControl1
         Set ctlMyControl = Form1.UserControl11
      End Sub

   -or-

 - Place the UserControl in a different project.

   -or-

 - Move the code to the Load Event of the Form containing the UserControl.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products
listed at the beginning of this article. We are researching this
bug and will post new information here in the Microsoft Knowledge
Base as it becomes available.

MORE INFORMATION
================

Steps to Reproduce Behavior
---------------------------

1. Start a new Standard EXE project in Visual Basic. Form1 is created by
   default.

2. From the Project menu, add a UserControl to the project.

3. Close the UserControl window, and add the UserControl to Form1.

3. From the Project menu, add a Module to the project.

4. Insert the following code into Module1:

      Sub Main()
         Dim ctlMyControl as UserControl1
         Set ctlMyControl = Form1.UserControl1
      End Sub

5. From the Project menu, chose Project1 Properties, and change the Startup
   Object to SubMain.

6. Run the project, and note that you receive the "Type Mismatch" error at
   this point.

Additional query words: kbDSupport kbDSD kbVBp500Bug kbNoKeyWord
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Version           : WINDOWS:5.0
Platform          : WINDOWS
Issue type        : kbbug
Solution Type     : kbnofix

=============================================================================

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Copyright Microsoft Corporation 1998.