Thread: C++ - win32: how calculate the Frame Per Second on GameLoop?

how can i calculate the FPS on GameLoop?

Code:

int Frame=0;
void GameLoop()
{
     //GetInput();
     //UpdateMovements();
     //DrawFrameThings();
     //Frame++;
     //GetTimeSomething();
     //if the time is a second then
     //FPS = Frame;
     //Frame=0;
}

i did a bad pseucode... but i don't know how get the time and test if is 1 second.

PS: i need a correction: before draw the frame(a memory frame), on screen, do i need, 1st, clear the screen(draw a fill black rectangle)?