void GetPreciseOrFallbackFileTime(FILETIME* ft) HMODULE hKernel = GetModuleHandleA("kernel32.dll"); if (hKernel) GetSystemTimePreciseAsFileTime_t pGetPrecise = (GetSystemTimePreciseAsFileTime_t)GetProcAddress(hKernel, "GetSystemTimePreciseAsFileTime"); if (pGetPrecise) pGetPrecise(ft); return;
SDL, a cross-platform development library used by countless games and multimedia applications, faced issue #9416: "Broken compatibility with Windows 7 (GetSystemTimePreciseAsFileTime)." The library's time module for Windows was directly using the Windows 8+ API, breaking all Windows 7 applications built with newer SDL versions. The solution required implementing fallback mechanisms for older Windows versions.
char buffer[128]; sprintf_s(buffer, sizeof(buffer), "Precise Time: %04d-%02d-%02d %02d:%02d:%02d:%03d", st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond, st.wMilliseconds); getsystemtimepreciseasfiletime windows 7 upd
void GetSystemTimePreciseAsFileTime( LPFILETIME lpSystemTimeAsFileTime );
Test your Windows 7 deployment with a small diagnostic tool that calls GetSystemTimePreciseAsFileTime and compare results across patched vs. unpatched machines. You’ll see the difference immediately. unpatched machines
For greenfield development, targeting Windows 10 or Windows 11 eliminates these compatibility concerns entirely – GetSystemTimePreciseAsFileTime is always available with full precision.
The back-ported version relies on the same KeQueryPerformanceCounter internal mechanism but wrapped in FILETIME format. In practice, you can expect on most modern hardware running the update. to MSVC v145)
: If the developer recently updated their compiler (e.g., to MSVC v145), they may have dropped Windows 7 support. Look for a version of the software released before the update.
if (pfn) pfn(ft); else GetSystemTimeAsFileTime(ft);