Calculate the execution time of a function

Calculate the execution time of a function :
we can use timeGetTime() fn available in mmsystem.h .
For using this function,
we have to include the winmm.lib


DWORD dwStartTime = timeGetTime();
StretchBlt(); // which we want to find the execution time
DWORD dwEndTime = timeGetTime();

dwEndTime - dwStartTime is the execution time.

we can also use QueryPerformanceCounter() fn to find the execution time.