Getsystemtimepreciseasfiletime: Windows 7 Upd

– Record exact arrival time of market data ticks.

Often, the most pragmatic solution is to find an older version of your application that predates the Windows 8 requirement. For many popular tools, the "last compatible version" for Windows 7 is well-documented:

. It was introduced in Windows 8 and Windows Server 2012 to provide timestamps with microsecond precision ( getsystemtimepreciseasfiletime windows 7 upd

For proprietary executables where you cannot recompile, you could create a shim DLL that provides the missing function:

PGETSYSTEMTIMEPRECISE pGetSystemTimePrecise = (PGETSYSTEMTIMEPRECISE)GetProcAddress(GetModuleHandle(TEXT( "kernel32.dll" "GetSystemTimePreciseAsFileTime" (pGetSystemTimePrecise) // Use the high-precision version on Win 8/10/11 pGetSystemTimePrecise(ft); // Fallback for Windows 7 GetSystemTimeAsFileTime(ft); – Record exact arrival time of market data ticks

For new applications, dynamic loading of the function provides the best of both worlds: microsecond precision when available, seamless fallback when not.

Since an official Microsoft update isn't coming, here are the only viable paths forward. It was introduced in Windows 8 and Windows

Behavior and semantics

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);