如何确定Windows和Windows系统目录

有两个SDK函数可以完成该功能。GetWindowsDirectory和GetSystemDirectory，下例说明了如何使用这两个函数：
TCHAR szDir [MAX_PATH];
//Get the full path of the windows directory.
:: GetWindowsDirectory (szDir, MAX_PATH);
TRACE ("Windows directory %s\n", szDir);
//Get the full path of the windows system directory.
:: GetSystemDirectory (szDir, MAX_PATH);
TRACE ("Windows system directory %s\n", szDir);