FARPROC GetProcAddress(
HMODULE hModule, // handle to DLL module
LPCSTR lpProcName // function name
);
lpProcName
[in] Pointer to a null-terminated string containing the function name, or specifies the function's ordinal value. If this parameter is an ordinal value, it must be in the low-order word; the high-order word must be zero.
如果为索引，高字必须为0，低字为索引
