How to get app's starting directory

How can I get application's starting directory?

CString GetExePath()
{
CString path;
LPSTR buf = path.GetBuffer(_MAX_PATH);

//Get exe path
VERIFY(::GetModuleFileName(NULL, buf, _MAX_PATH));

path.ReleaseBuffer();
// path.MakeLower();

return path.Left(path.ReverseFind('\\'));
}