I learnt the d3d aspects of C++ from
Delta Hackers - many good coders willing to help with any questions relating to C++ and other languages for many of them know multiple coding language such as vb, delphi and java.
************* - you probably already know about GD.
********* - is also useful for hack making
Also looking through the links on DH these have good ratings:
-https://www.openasthr*****m/ -unfortunately it's down atm though.
finding more...