// Typedef for the function pointer of the Windows 8+ API typedef void (WINAPI* FnGetSystemTimePreciseAsFileTime)(LPFILETIME);
The most successful way to force apps requiring this function to execute on Windows 7 is by using an open-source compatibility layer called VxKex on GitHub.
When modern applications built with updated compilers try to run on Windows 7, users are met with a fatal crash error: "The procedure entry point GetSystemTimePreciseAsFileTime could not be located in the dynamic link library KERNEL32.dll." 🔍 Why the Error Occurs on Windows 7
#endif // SYSTEM_TIME_H
If you're a Windows 7 user encountering this error with a specific application:
This method ensures broad compatibility without crashing. If you encounter the error with a specific piece of software, it means the developer implement this fallback, and the application has a hard dependency on the new API.
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The C++ std::chrono::system_clock::now() on Windows 7 ultimately calls GetSystemTimeAsFileTime – no improvement without the update.
iperf3, a popular network performance measurement tool, began using GetSystemTimePreciseAsFileTime in version 3.17.1. When Windows 7 users attempt to run this version, they encounter the missing entry point error. The impact is severe: without the high-precision time function, network test accuracy degrades from microsecond-level to second-level, rendering the tool ineffective for precise throughput measurements.
Verify your system has Windows 7 Service Pack 1 installed. Solution 3: Workarounds for Developers and Power Users // Typedef for the function pointer of the
If you are targeting a platform lower than Windows 8, the prototype will not be visible, leading to a compiler warning or error. To solve this, if you need the prototype for runtime dynamic loading, you must define _WIN32_WINNT to 0x0602 (Windows 8) or higher.
void GetPreciseOrFallbackFileTime(FILETIME* ft) HMODULE hKernel = GetModuleHandleA("kernel32.dll"); if (hKernel) GetSystemTimePreciseAsFileTime_t pGetPrecise = (GetSystemTimePreciseAsFileTime_t)GetProcAddress(hKernel, "GetSystemTimePreciseAsFileTime"); if (pGetPrecise) pGetPrecise(ft); return;