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Q128237: PRB: Polyline Fails with NULL Clipping Region

Article: Q128237
Product(s): Microsoft Windows Software Development Kit
Version(s): WINDOWS:3.1
Operating System(s): 
Keyword(s): kb16bitonly
Last Modified: 06-NOV-1999

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The information in this article applies to:

- Microsoft Windows Software Development Kit (SDK) 3.1 
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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 query words: 3.10 no32bit Polygon fails hidden

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Keywords          : kb16bitonly 
Technology        : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK310
Version           : WINDOWS:3.1

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