Miliseconds

#include "Windows.h"

long long milliseconds_now() {
    static LARGE_INTEGER s_frequency;
    static BOOL s_use_qpc = QueryPerformanceFrequency(&s_frequency);
    if (s_use_qpc) {
        LARGE_INTEGER now;
        QueryPerformanceCounter(&now);
        return (1000LL * now.QuadPart) / s_frequency.QuadPart;
    }
    else {
        return GetTickCount();
    }
}