How!?!?! LOL I am getting back into OpenGL again with Haskell now and I have a program that listens to all the callbacks and prints stuff out, terminates on Ctrl+X and draws a grey sphere. Earth shattering. If I was using C/C++ I'd be using a (shudder) global pointer to a record containing state that the render callback would use to know what to do. I smell state monads or something but I cannot see how to pass them into "the loop". I want to organise my code so that all input events cause a record to be updated and then the render part just uses the current values to draw the right things, with the obvious caveat of "what if a key event happens half way through the render phase." MVars? Threads? What??? I'm a real newb on this right now! How do I,or what is a "best practice" for passing a continuously changing record across calls given that the "displayCallback" doesnt have any obvious place to plug one on? In Erlang or even Haskell, there is the idion of making a tail call back to yourself with the new modified record and so on but I cannot figure out where to actually pass it around! Thanks in advance. Sean.