如何在運行時檢查Win API函數支持？

Question

如何在運行時檢查運行系統是否支持功能GetSystemTimePreciseAsFileTime？

Answer 1

使用著名的GetProcAddress查找功能的存在，這樣的

typedef void (WINAPI *FuncT) (LPFILETIME lpSystemTimeAsFileTime); 

HINSTANCE hDLL = LoadLibrary(L"Kernel32.dll"); 
FuncT GetSystemTimePreciseAsFileTime = (Func) GetProcAddress((HMODULE)hDLL, L"GetSystemTimePreciseAsFileTime"); 

if (GetSystemTimePreciseAsFileTime) 
{ 
    // function is exposed by the DLL, now it can be called 
    GetSystemTimePreciseAsFileTime(...); 
}