Microsoft KB Archive/140727

{|
 * width="100%"|

BUG: Screen Saver Not Getting WM_DESTROY in Windows NT

 * }

Q140727

-

The information in this article applies to:


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

-

SYMPTOMS
When a 32-bit screen saver running under Windows NT 3.5 or 3.51 terminates due to a mouse move, mouse click, or key press, although the application terminates, the window never gets the WM_DESTROY message. Failure to receive this message poses a problem as applications are not able to call clean-up routines such as deleting GDI objects, freeing memory objects, and so on. This results in a memory leak and further reduction of system resources each time the screen saver application is run.

This problem does not occur when the screen saver is run in Test mode under Windows NT's Control Panel. In Test mode, the screen saver receives the WM_DESTROY message.

STATUS
Microsoft has confirmed this to be a problem with the Scrnsave.lib file that shipped with the Win32 SDK for Windows NT 3.51 and Windows 95. It is scheduled to be fixed in the next release of the Win32 SDK. However, this problem is specific to Windows NT; it does not occur with 32-bit screen savers under Windows 95.

Additional query words: 3.50

Keywords :

Issue type :

Technology : kbAudDeveloper kbWin32sSearch kbWin32API