copychars是字符拷贝的意思。。使用方法:CSimpleString str(_T("xxxxxxxxxxxxxxxxxxx"), 20, pMgr);TCHAR* pszSrc = _T("Hello world!");_tprintf_s(_T("%s\n"), str);str.CopyChars(str.GetBuffer(), pszSrc, 12);_tprintf_s(_T("%s\n"), str);