I have compiled an ATL COM object in VS.net 2003, in which I use the ATL CSMTPConnection class to send emails, however when I try to register the COM object on a Windows 2000 machine the registration fails.
The DLL ws2_32.dll appears to be missing the function GetAddrInfoW, the unicode version of GetAddrInfo. The registration works fine on WindowsXP.

Can I get this to work on Windows 2000?