FIX: VB5 IDE Disappears or IPFs When "End" Button Is Pressed

Last reviewed: December 18, 1997
Article ID: Q171505

The information in this article applies to:

Microsoft Visual Basic Control Creation, Learning, Professional, and Enterprise Editions for Windows, version 5.0

SYMPTOMS

While running in debug mode, Visual Basic may disappear or generate an Illegal Page Fault (IPF) error message when the "End" Toolbar item is pressed.

CAUSE

Visual Basic encounters an unhandled exception and terminates.

RESOLUTION

Upgrade to Visual Studio 97 Service Pack 2 (SP2).

   -or-

Avoid stopping program execution inside events.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been fixed in Visual Studio 97 Service Pack 2.

For more information on the Visual Studio 97 Service Pack 2, please see the following article in the Microsoft Knowledge Base:

   ARTICLE-ID: Q170365
   TITLE     : INFO: Visual Studio 97 Service Packs - What, Where, and Why

For a list of the Visual Basic 5.0 bugs that were fixed in the Visual Studio 97 Service Pack 2, please see the following article in the Microsoft Knowledge Base:

   ARTICLE-ID: Q171554
   TITLE     : INFO: Visual Basic 5.0 Fixes in Visual Studio 97
               Service Pack 2

MORE INFORMATION

Steps to Reproduce Behavior

Create a Standard EXE project with 3 forms (Form1, Form2, and Form3).
Place one CommandButton on both Form1 and Form2.
Place the following code in the Command1_click event on Form1:
```
      Form2.show vbModal
```
Place the following code in the Command1_click event on Form2:
```
      Form3.show vbModal
```

Add the following code to the Form3_load event:

      Dim a, b
      Debug.print "Loading Form"

Add the following to the Form3_Unload event:
```
      Debug.print "Unloading Form"
```
Press the F5 key to start execution.
Press CTRL+BREAK to enter debug mode.
In the Immediate Window (CTRL+G), enter "Command1_click" (without the quotes) to activate the Command1_click event.
Press CTRL+BREAK to enter debug mode.
Press the F8 key to Begin Stepping through code.
Click the Command1 button on Form 2.
Press the F8 key to step into load event of Form3.
When you reach the Debug.print line (before executing this line),
```
    stop program execution.
```
At this point, Visual Basic will appear to continue running the program. Click the End button again. The Visual Basic IDE will disappear or Visual Basic will generate an Invalid Page Fault(IPF) error message.

Keywords          : vb5all VS97FixlistSP3 VS97FixlistSP2 VB5FixlistSP2
Version           : 5.0
Platform          : WINDOWS
Issue type        : kbbug
Solution Type     : kbfix kbservicepack

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Last reviewed: December 18, 1997
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