KB171493 - FIX: Viewing Property Pages and Exiting Causes Memory Leak

Article ID: 171493

Article Last Modified on 12/10/2003

APPLIES TO

Microsoft Visual Basic 5.0 Control Creation Edition
Microsoft Visual Basic 5.0 Learning Edition
Microsoft Visual Basic 5.0 Professional Edition
Microsoft Visual Basic 5.0 Enterprise Edition

This article was previously published under Q171493

SYMPTOMS

Viewing property pages several times and exiting causes a memory leak.

CAUSE

The Visual Basic IDE fails to release its object property list before re-allocating space for a new list.

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:

170365 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:

171554 INFO: Visual Basic 5.0 Fixes in Visual Studio 97 Service Pack 2

MORE INFORMATION

The detection of this problem requires a memory checker or debug version of Visual Basic.

Steps to Reproduce Behavior

Start a new Standard EXE project. Form1 is created by default.
On Form1, place a Toolbar control (from Comctl32.ocx - Windows Common Controls 5.0).
Right-click the Toolbar control to bring up the context menu.
Select Properties from the context menu.
Click either the "OK" or the "Cancel" button of the property page.
Repeat steps 3-5.
Click File, Exit. Say "No" to the question "Save changes to the following files?"

Upon exiting, the Debug version of Visual Basic will raise the error:

"Heap Memory leak detected."

Results by third-party memory checkers may vary.

Keywords: kbbug kbfix kbvbp500sp2fix kbvs97sp2fix KB171493