MFTIME

typedef LONGLONG MFTIME;

const MFTIME ONE_SECOND = 10000000; // One second.
const LONG   ONE_MSEC = 1000;       // One millisecond

// Convert 100-nanosecond units to milliseconds.

inline LONG MFTimeToMsec(const LONGLONG& time)
{
    return (LONG)(time / (ONE_SECOND / ONE_MSEC));
}