Hello, ADO(C++) World! (ADO + OLEDB + SQL Server)

hello.cpp

#include <stdio.h>
#include <tchar.h>
#import "msado15.dll" no_namespace rename("EOF", "adoEOF")
 
int _tmain( int argc, TCHAR* argv[] )
{
    CoInitialize(NULL);
 
    _ConnectionPtr  cn("ADODB.Connection");
    _RecordsetPtr   rs("ADODB.Recordset");
 
    cn->Open( _T("PROVIDER=SQLOLEDB;SERVER=(local);DATABASE=master;"), 
        _T("sa"), _T("P@ssW0rd"), adConnectUnspecified),
 
    rs = cn->Execute( _T("SELECT 'Hello, ADO(C++) World' AS Message"), NULL, adCmdText );
 
    while ( !rs->EndOfFile )
    {
        _variant_t var = rs->Fields->GetItem( 0L )->Value;
        _tprintf( _T("%s\n"), (LPCTSTR)(_bstr_t)var );
        rs->MoveNext();
    }
    rs->Close();
    cn->Close();
    rs = NULL;
    cn = NULL;
 
    CoUninitialize();
 
    return 0;
}