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Environment: Windows 9x/NT, Visual C++ 6.0
If you use Sleep() in your code, you will soon realize that your application "appears" to block. This is because the Sleep() function does not process the message pump, and due to this your application gives the appearance of "hanging" for some time.
You may not find it neccessary to use the XSleep() function all the time. For instance, in a console based application. There are some scenarios where you may need this over Sleep(), especially if you're using Sleep in a GUI application.
The XSleep() code uses only Win32 calls, and so it can be used in both MFC and Win32 applications.
To use XSleep() include the XSleep.h file into your project and then call the XSleep() function with the required sleep duration in miliseconds as the parameter.
XSleep(1000); // sleep for 1 second
A demo Visual C++ 6.0 project is available for download. The demo creates two threads and makes them both go to sleep for 2 seconds.