TimeSmp.exe - High-Resolution Timing Services |
Q75910
The information in this article applies to:
- Microsoft Windows Software Development Kit (SDK) 3.0
SUMMARY
TimeSmp.exe is a file that demonstrates how to use the high-resolution timer services provided by the Microsoft Multimedia Windows graphical environment.
MORE INFORMATION
The following file is available for download from the Microsoft Download Center:
For additional information about how to download Microsoft Support files, click the article number below to view the article in the Microsoft Knowledge Base:
Q119591 How to Obtain Microsoft Support Files from Online Services
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The timer services provided by Multimedia Windows allow an application to schedule timed periodic interrupts or one-time interrupt events at a higher resolution than is available through the standard Windows timer services.
Unlike the Windows timer services, the Multimedia timer services are interrupt-based. Rather than posting WM_TIMER messages to a message queue, the Multimedia service calls a specified function at interrupt time. Because the callback code is accessed at interrupt time, it must adhere to strict programming guidelines. In particular, only a very limited set of system function calls may be made, and the callback function must reside in a fixed-code dynamic-link library (DLL).
The Multimedia timer services are useful for applications that demand high-resolution timing, such as a MIDI sequencer. For less demanding synchronization tasks, use the SetTimer function provided by Windows.
The sample application TIMESMP demonstrates using the timer services and a callback function residing in a fixed code DLL.
Additional query words:
Keywords : kbfile kbmm kbsample kb16bitonly kbTimer
Issue type :
Technology : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK300
Last Reviewed: December 25, 1999 |
