BUG: MoveTo/LineTo Causes Divide by 0 Error

 Last reviewed: January 5, 1995
Article ID: Q111007
The information in this article applies to:
  • Microsoft Windows Software Development Kit (SDK) for Windows, version 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: 

   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. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Additional reference words: buglist3.10 3.10
KBCategory: kbprg kbbuglist
KBSubcategory: GdiDrw

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Last reviewed: January 5, 1995
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