Windows 7 Upd — Getsystemtimepreciseasfiletime

Or specify it in your compiler command line:

The function GetSystemTimePreciseAsFileTime is a high-precision timing API that is not natively supported on Windows 7

To fully understand the value of the precise function, it is helpful to compare it directly with the older, more widely supported function. The core differences can be summarized as follows:

void test() FILETIME ft; // If on Windows 7 without update, this function pointer will be NULL VOID WINAPI pFunc = (VOID WINAPI ( )(LPFILETIME)) GetProcAddress(GetModuleHandle(L"kernel32"), "GetSystemTimePreciseAsFileTime"); getsystemtimepreciseasfiletime windows 7 upd

static void InitFunction(void) HMODULE hK32 = GetModuleHandleA("kernel32.dll"); if (hK32) pGetSystemTimePreciseAsFileTime = (GetSystemTimePreciseAsFileTime_t)GetProcAddress(hK32, "GetSystemTimePreciseAsFileTime");

"无法定位程序输入点 GetSystemTimePreciseAsFileTime 于动态链接库 kernel32.dll 上" (in Chinese systems) or:

| Windows Version | GetSystemTimePreciseAsFileTime available? | |----------------|----------------------------------------------| | Windows 7 RTM | ❌ No | | Windows 7 SP1 (no updates) | ❌ No | | Windows 7 SP1 + KB3033929 | ✅ Yes | | Windows 7 SP1 + Convenience Rollup KB3125574 | ✅ Yes | | Windows 8 and later | ✅ Yes (natively) | Or specify it in your compiler command line:

If you are developing software that needs to run on both Windows 7 and newer versions, use GetProcAddress to check for the function at runtime. If it's missing, fall back to GetSystemTimeAsFileTime , which is supported on Windows 7.

Ensure your Windows 7 system is fully updated via Windows Update, particularly with SHA-2 code signing support updates, as modern Microsoft installers require this. Alternative Solutions for Developers

If you're targeting Windows 7, always the function and fall back to GetSystemTimeAsFileTime when missing. If it's missing, fall back to GetSystemTimeAsFileTime ,

to the Microsoft Update Catalog if you prefer searching by KB number.

GetSystemTimePreciseAsFileTime is slower than GetSystemTimeAsFileTime because it must read from the high-resolution timer and convert to system time format. For non-critical paths, this is fine.

According to Microsoft documentation:

Solution A: Patch the Application (If you are the developer)