Microsoft KB Archive/91072

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PRB: IsGDIObject Enhanced and Renamed to GetObjectType

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Q91072

4.00 | 3.10 3.50 3.51 4.00 WINDOWS | WINDOWS NT kbgraphic kbprb

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The information in this article applies to:


 * Microsoft Win32 Application Programming Interface (API), used with:
 * Microsoft Windows NT Server versions 3.5, 3.51, 4.0
 * Microsoft Windows NT Workstation versions 3.5, 3.51, 4.0
 * Microsoft Windows 95

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SYMPTOMS
In the original version of Win32, there is no IsGdiObject function in the Win32 API. However, the new function GetObjectType can be used as a replacement for IsGDIObject.

The changes apply to Windows 95 and Windows NT 4.0.

CAUSE
The Windows 3.1 IsGDIObject function has been enhanced and renamed to GetObjectType. In addition to verifying that an object handle refers to a GDI object, GetObjectType also returns a value that describes what kind of object the handle represents.

RESOLUTION
You can use the following macro to aid in porting your programs that were originally designed for Windows 3.1:

  #define IsGDIObject(hobj) ((BOOL)GetObjectType(hobj))

STATUS
This behavior is by design.

Additional query words: 3.10

Keywords : kbOSWinNT350 kbOSWinNT351 kbOSWinNT400 kbSDKWin32 kbOSWin95 kbDSupport

Issue type : kbprb

Technology : kbAudDeveloper kbWin32sSearch kbWin32API