Hi there. I want to divide my window into subwindows to display different informations (like Nate Robins in his OpenGL Tutorials, if anyone knows). So I try to work out his solution in Haskell. My Main.hs has the following structure: main :: ... mainWin<-createWindow.. reshapeFunc (Just mainReshape) displayF... mainDisplay sub1<-createSubWindow mainWin ... reshapeFunc (Just sub1Reshape) ... -- here follows the interesting part -- in the mainReshape Nate Robins call the subReshapes... mainReshape :: ReshapeAction ... ... setWindow sub1 --!!! no sub1-Window in there :-( positionWindow (...) reshapeWindow (...) ----------------------------------------------------------------- its clear that sub1 isnt known in the mainReshape. In C you can define global variables to solve this. Is that in Haskell possible too? I can't give the sub1 Window directly to the mainReshape (mainReshape :: Window -> Resh..) because when the funtion is called in the main this sub1 isnt created yet (see above). I hope this was a clear description of the dilemma I'm in. And I pray, that I'm just too stupid and the solution is much more clearer to you. Thanx a lot Patrick