如何在运行时检查Win API函数支持？

Question

如何在运行期间检查运行时是否支持函数GetSystemTimePreciseAsFileTime？

Answer 1

使用着名的GetProcAddress来查找函数的存在，就像这样

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(...);
}