Hello,
I'm interested and would like to ask a few questions.
Is it a MMO-game or a usual PC game? What does the game-hook do/intended for? Do you need to send some predefined input to the game (like pressing one key and the hook will send some key combination or even a key sequence to the game)? Or do you need to catch the input and do some action in response?
Several years ago I worked on a project called PwnBoxer (I think there are still reviews available in my profile on Freelancer, you can find them by looking for an employer with a name Timgt). It hooked input of the World of Warcraft game - both keyboard and mouse - so users could launch several copies/accounts of the game and play them at the same time (there are probably some videos still available on YouTube demonstrating this).
I'm not sure if I'll be able to disassemly the DLL and what exactly need to be done in this project, but if it's something I can do then I'll be glad to help :).
Best Regards,
Sergey.