KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q111007: BUG: MoveTo/LineTo Causes Divide by 0 Error

Article: Q111007
Product(s): Microsoft Windows Software Development Kit
Version(s): WINDOWS:3.1
Operating System(s): 
Keyword(s): kbSDKWin16
Last Modified: 19-JUN-1999

3.10
WINDOWS
kbprg kbbuglist

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

- Microsoft Windows Software Development Kit (SDK) 3.1 
-------------------------------------------------------------------------------

SYMPTOMS
========

Using MoveTo() or LineTo() with a delta X or delta Y greater than 16K to draw
within a complex clipping region, causes the system to display the following
error message in a system modal dialog box appears:

  Application Error integer divide by 0

CAUSE
=====

If the change in x or the change in y in the MoveTo/LineTo calls is greater than
16K, and if the line is being drawn to a complex clipping region, a divide
overflow error occurs in GDI.exe. This problem does not occur for smaller
changes in x or y, and it also does not occur if the line is being drawn to a
noncomplex clipping region.

RESOLUTION
==========

This bug can be worked around by avoiding complex clipping regions, or if
complex regions are critical, by ensuring that the changes in x and y in
MoveTo/LineTo calls are always less than 16K.

STATUS
======

Microsoft has confirmed this to be a bug in Windows version 3.1.

Additional query words: buglist3.10 3.10

======================================================================
Keywords          : kbSDKWin16 
Technology        : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK310
Version           : WINDOWS:3.1
Issue type        : kbbug
Solution Type     : kbnofix

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

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.