CString、LPSTR、std::string、LPCSTR之间的转换

LPSTR WideChar2MBCS( const CString& strCS )
{
   const UINT wLen= strCS.GetLength()+ 1;
    UINT aLen= WideCharToMultiByte(CP_ACP,0,strCS,wLen,NULL,0,NULL,NULL);
    LPSTR lpa= newchar[aLen];
    WideCharToMultiByte(CP_ACP,0,strCS,wLen,lpa,aLen,NULL,NULL);
   return lpa;
}

std::string WideChar2StdStr(const CString& strcs)
{
    LPSTR l= WideChar2MBCS(strcs);
    std::string stdStr(l);
    delete [] l;
   return stdStr;
}

LPOLESTR MBCS2WideChar( LPCSTR lpa )
{
    size_t aLen= strlen(lpa)+ 1;
   int wLen = MultiByteToWideChar(CP_ACP,0,lpa,aLen,NULL,0);
    LPOLESTR lpw= new WCHAR[wLen];
    MultiByteToWideChar(CP_ACP,0,lpa,aLen,lpw,wLen);
   return lpw;
}

CString MBCS2CString( LPCSTR lpa )
{
    LPOLESTR lpw= MBCS2WideChar(lpa);
    CString cstring(lpw);
    delete [] lpw;
   return  cstring;
}

CString StdStr2CSting(const std::string& stdStr )
{
   return MBCS2CString(stdStr.c_str());
}