Hello everybody, Currently all my C++ project are on a Windows XP machine. For database connections I’m using ado. In stdafx.h I have lines: #import "c:\Program Files\Common Files\system\ado\msado15.dll" rename_namespace( "ado" ) rename("EOF", "ADOEOF") #import "C:\Program Files\Microsoft SQL Server\80\Tools\Binn\Resources\1033\sqldmo.rll" no_namespace And when it’s required I call ado::_ConnectionPtr pConn = NULL; hr = pConn.CreateInstance( __uuidof( ado::Connection ) ); Everything has been working fine. But now I’m moving all my projects to Windows 7 machine. And it appears, that created .exe files are working fine on Windows 7 machine but on Windows XP ado pointer could not be created. hr = pConn.CreateInstance( __uuidof( ado::Connection ) ); doesn’t create valid connection object. Thank you in advance, any suggestions will be appreciated