hey remus & mike i found a solution i've used the modifystyle function to remove flags ws_thickframe|ws_maximizebox and that did the job thanks again for your support,if you'll ever need anything you know my address Guy ,Israel.

thanks remus for your help i've tried it before and it didn't work,so i will try again thanks anyway

how can I prevent the user the adjust/resize the window with mouse? thamks in advanced guy