I'm actually a Delphi developer and I want to learn the Win32 API as well as Winsock programming. Eventually I'd also like to learn C# (.NET) since it seems like that is where everything is moving ...

Mm, I can't recommend a good website (besides msdn.microsoft.com), but I will say that I find an easy way to learn stuff like this is to find a need first - what specific application or tool do you ...