字符串转换

1.CString->std::string

    CString str = _T("Hello");

    std::string s = (CStringA)str;

2.std::string->CString

   #include <comutil.h>

    std::string s ="";

    CString strMsg = (LPCTSTR)_bstr_t(s.c_str());

3.CString->const char*

    #include <comutil.h>

    CString str = _T("Hello");

    _bstr_t respond = (LPCTSTR)str;

    const char* pRespond = (const char*)respond;