PRB: Polyline Fails with NULL Clipping Region (128237)


The information in this article applies to:

  • Microsoft Windows Software Development Kit (SDK) 3.1
This article was previously published under Q128237

SYMPTOMS

The Polyline API will return a failure code if called on a DC that has a NULL clipping region selected. One situation in which this can occur is when Polyline is used to draw into a DC for a window that is completely obscured by another window.

RESOLUTION

Check to see if the clipping region is NULL before calling Polyline and testing its return value.

STATUS

This behavior is by design on Windows 3.1.

This behavior does not occur on Windows NT or on Windows 95.
Modification Type:MajorLast Reviewed:11/6/1999
Keywords:kb16bitonly KB128237
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