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void DelayUs(__int64 Us)
{
LARGE_INTEGER CurrTicks, TicksCount;
QueryPerformanceFrequency(&TicksCount);
QueryPerformanceCounter(&CurrTicks);
TicksCount.QuadPart = TicksCount.QuadPart * Us / 1000000;
TicksCount.QuadPart += CurrTicks.QuadPart;
while (CurrTicks.QuadPart < TicksCount.QuadPart)
QueryPerformanceCounter(&CurrTicks);
}
DelayUs( 7200);