see me wrote: Yaa...Need to handle WM_SIZE too:) :) "Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow cheers, Alok Gupta VC Forum Q&A :- I/ IV Support CRY- Child Relief and You

I don't think you are following Micro$oft's recommendations. I just checked MSDN and it says to use __stdcall for FORTRAN functions. For more info search for mixed-language programming in the MSDN docs. __________________________________________ a two cent stamp short of going postal.