Getsystemtimepreciseasfiletime Windows 7 Patched Verified

Once patched:

void GetPreciseTimeFileTime(FILETIME *ftOut) HMODULE hKernel = GetModuleHandleW(L"kernel32.dll"); if (hKernel) PFN_GetSystemTimePreciseAsFileTime pfn = (PFN_GetSystemTimePreciseAsFileTime)GetProcAddress(hKernel, "GetSystemTimePreciseAsFileTime"); if (pfn) pfn(ftOut); return;

If you are dealing with a single standalone application or game that fails to start, you can manually patch the binary file to swap the broken function call with a compatible fallback. GetSystemTimePreciseAsFileTime error on Windows 7 #101 getsystemtimepreciseasfiletime windows 7 patched

| Requirement | Value | |-------------|-------| | Minimum supported client | Windows 8 [desktop apps | UWP apps] | | Minimum supported server | Windows Server 2012 [desktop apps | UWP apps] | | Header | sysinfoapi.h (include Windows.h) | | Library | Kernel32.lib | | DLL | Kernel32.dll |

However, it turns out there is a "patched" way to achieve nanosecond precision on Windows 7—without requiring a service pack update. It involves digging into the undocumented side of the Windows kernel. Since there is no official Microsoft "patch" to

Since there is no official Microsoft "patch" to add this function to Windows 7, users typically rely on the following methods:

class PreciseTime using Fn = VOID (WINAPI *)(LPFILETIME); Fn fn = nullptr; public: PreciseTime() HMODULE k = GetModuleHandleW(L"kernel32.dll"); if (k) fn = (Fn)GetProcAddress(k, "GetSystemTimePreciseAsFileTime"); Fn fn = nullptr

void init_time_interp() QueryPerformanceFrequency(&qpc_freq); QueryPerformanceCounter(&qpc_base); GetSystemTimeAsFileTime(&ft_base); time_init = 1;