time

LARGE_INTEGER li;
Double frequency;
Double time;
HRESULT hresult;

// Get the high-resolution timer frequency
hresult = QueryPerformanceFrequency(&li);
if(!hresult) { return false; }

// Set the timer frequency to milliseconds
frequency = (double)li.QuadPart / 1000.0;

// Reset the timer
QueryPerformanceCounter(&li);
time = li.QuadPart;

// Stuff goes here

// Get the elasped time
QueryPerformanceCounter(&li);
time = li.QuadPart - time;
time /= frequency;

// Time stuff goes here

// Reset the timer
QueryPerformanceCounter(&li);
time = li.QuadPart;

// Go back to the stuff goes here