Does the timeBeginPeriod API affect the system clock?

Question

I have a Win32 application, and there are some animiation UI in my application, to make the animiation more smooth, I called timeBeginPeriod to improve the time resolution, but I found the system clock will delay some seconds if my application is running very long time. Does the timeBeginPeriod affect the system clock?

Answer 1

Good question. I didn't know this but yes it can. According to MSDN: "Use caution when calling timeBeginPeriod, as frequent calls can significantly affect the system clock, system power usage, and the scheduler."