code:
#define MAKEINTRESOURCEW ((LPWSTR)((ULONG_PTR)((WORD))))
#define TD_WARNING_ICON MAKEINTRESOURCEW(-1)
#define TD_ERROR_ICON MAKEINTRESOURCEW(-2)
#define TD_INFORMATION_ICON MAKEINTRESOURCEW(-3)
#define TD_SHIELD_ICON MAKEINTRESOURCEW(-4)
TD_QUESTION_ICON is not in the SDK headers I'm afraid. It seems Microsoft recommend against its use.