if (pGetTimePrecise) FILETIME ft; pGetTimePrecise(&ft); printf("High-res UTC time obtained.\n"); // Convert ft to human-readable if needed... else printf("GetSystemTimePreciseAsFileTime not available (missing KB2670838?)\n"); // Fallback to GetSystemTimeAsFileTime FILETIME ft; GetSystemTimeAsFileTime(&ft);
If your application requires sub-millisecond precision on Windows 7, the standard fallback isn't enough. In this case, developers often combine GetSystemTimeAsFileTime (for the absolute date/time) with QueryPerformanceCounter (to calculate the high-resolution offset). getsystemtimepreciseasfiletime windows 7 upd
Notes:
This precision is non-negotiable for many modern applications: if (pGetTimePrecise) FILETIME ft
C# cannot directly call this API without P/Invoke, but you can use: printf("High-res UTC time obtained.\n")
That barrier has a solution: a specific Windows 7 update that back-ports this precision time function. This article explores , the required Windows 7 update, how to implement it, and critical compatibility considerations.