PRB: Polyline Fails with NULL Clipping Region

Last reviewed: July 23, 1997
Article ID: Q128237

3.10 WINDOWS kbgraphic kbprb

The information in this article applies to:

Microsoft Windows Software Development Kit (SDK) for Windows version 3.1

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.

Additional reference words: 3.10 Polygon fails hidden
KBCategory: kbgraphic kbprb
KBSubcategory: GdiDrw
Keywords : kb16bitonly

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Last reviewed: July 23, 1997
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