DOCUMENT:Q190039  07-AUG-1998  [vbwin]
TITLE   :BUG: VB Crashes When Deselecting Multi-selected Objects
PRODUCT :Microsoft Visual Basic for Windows
PROD/VER:WINDOWS:6.0;
OPER/SYS:WINDOWS
KEYWORDS:kbVBp600bug

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

 - Microsoft Visual Basic Learning, Professional, and Enterprise Editions
   for Windows, version 6.0
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SYMPTOMS
========

If you multi-select three or more controls on a form using either the Ctrl
key or Shift key and then deselect one of the controls with the Properties
window closed in the integrated development environment (IDE), VB6.exe
crashes.

NOTE: This problem does not occur if the Properties window is open.

RESOLUTION
==========

To work around this problem, open the Properties window. You can open the
Properties window by pressing the F4 key or clicking on the Properties
Window in the View menu in the VB6 IDE.

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 Standard EXE project in Visual Basic. Form1 is created by
   default.

2. On Form1 place a TextBox (Text1), a CommandButton (Command1), and an
   OptionButton (Option1). (It does not matter which three controls you
   use.)

3. Close the Properties window by either clicking the "X" in the
   upper-right corner of the Properties window, or right-clicking the
   Properties window and select Hide.

4. Hold down the Shift key and select the three controls with the mouse.

5. Deselect one of the controls by holding the Shift key down and clicking
   on one of the selected controls.

This will produce a crash in VB6.exe. Typical error messages that might
appear are:

   An application error has occurred and an application error log is being
   Generated.

   This program has performed an illegal operation and will be shut down.

Additional query words: Exception Error Access violation IPF Invalid Page
Fault GPF
======================================================================
Keywords          : kbVBp600bug
Version           : WINDOWS:6.0;
Platform          : WINDOWS
Issue type        : kbbug
Solution Type     : kbpending

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Copyright Microsoft Corporation 1998.