CString

1.CString分别在MFC、WTL、ATL中都有实现，但是用法基本一样。

//using cstringtypedef CHAR *LPSTR;typedef WCHAR *LPWSTR;#ifdef UNICODE typedef LPWSTR LPTSTR;#else typedef LPSTR LPTSTR;#endifusing ATL::CStringA;using ATL::CString;using ATL::CStringW;/**ATL::CStringA cstra / LPSTRATL::CStringW cstrw / LPWSTRATL::CString cstr / LPTSTR**///eg: string as function outputsCStringA GetUinfo(LPSTR id);CStringW GetUinfo(LPWSTR id);CString GetUinfo(CString& id);CStringW myString1 = _T("This is a test");CStringA myString2 = "This is a test";wchar_t wchar1[40] = {0};char char2[40] = {0};strcpy(char2, (LPCSTR)myString2);wcscpy(wchar1, (LPCWSTR)myString1);strcpy(myString2.GetBuffer(40), "this is copy string!");myString2.ReleaseBuffer();wcscpy(myString1.GetBuffer(40), _T("this is copy string!"));myString2.ReleaseBuffer();