Solution:

It is results from the setting of checking event time interval. As the program code below, the example set the check event time to be 5000 milliseconds. It is recommended that you can change it to the time interval which is suitable for your application, such as 50000 milliseconds while(TickValue > GetTickCount()) { // Check message ptCheckEvent.EventType = &usEventType; ptCheckEvent.Milliseconds = 5000;