s.Format(_T("%d"), total);中_T是什么意思?_T("%d")又表示什么 ？求大侠帮帮我

_T macro is same as TEXT macro。 (VC++) It is defined in "tchar.h" for Unicode character (string). _T("FOOBAR") is same as L"FOOBAR" example: TCHAR tch = _T('C'); const TCHAR * tstr = _T("中文");