The Old New Thing

Killing a window timer prevents the WM_TIMER message from being generated for that timer, but it doesn't retroactively remove ones that were already generated

December 5, 2014 Dec 5, 2014 12/5/14

Raymond Chen

Calling to cancel a window timer prevents messages from being generated for that timer, even if one is overdue. In other words, give this sequence of operations: no message is ever generated. Even though a timer became due during the , no timer message was generated during the sleep because timer messages are generated on demand, and ...