void GetPreciseOrFallbackFileTime(FILETIME* ft) HMODULE hKernel = GetModuleHandleA("kernel32.dll"); if (hKernel) GetSystemTimePreciseAsFileTime_t pGetPrecise = (GetSystemTimePreciseAsFileTime_t)GetProcAddress(hKernel, "GetSystemTimePreciseAsFileTime"); if (pGetPrecise) pGetPrecise(ft); return;
#define _WIN32_WINNT 0x0601 // Target Windows 7 #include <windows.h> getsystemtimepreciseasfiletime windows 7 upd
typedef void (WINAPI *LPFN_GetSystemTimePreciseAsFileTime)(LPFILETIME); void GetSystemTimeBestEffort(LPFILETIME lpFileTime) static LPFN_GetSystemTimePreciseAsFileTime pGetSystemTimePreciseAsFileTime = (LPFN_GetSystemTimePreciseAsFileTime)GetProcAddress( GetModuleHandleA("kernel32.dll"), "GetSystemTimePreciseAsFileTime"); if (pGetSystemTimePreciseAsFileTime != NULL) // Use the high-precision API if available (Windows 8+) pGetSystemTimePreciseAsFileTime(lpFileTime); else // Fallback for Windows 7 / Server 2008 R2 GetSystemTimeAsFileTime(lpFileTime); Use code with caution. Method B: Downgrade Compiler Toolsets if (pGetPrecise) pGetPrecise(ft)
Purpose
| Operating System | Native Support | Notes | |----------------|----------------|-------| | Windows 10 / 11 | Yes | Full native support | | Windows 8 / 8.1 | Yes | Introduced with Windows 8 | | Windows 7 | No (without update) | Not present in original RTM or SP1 | | Windows Vista / XP | No | No update available | getsystemtimepreciseasfiletime windows 7 upd