accessing controls on another form

Question

HI, here's my problem; My application loads up 3 forms at startup. Deppending on what button is press on form1 i want to show or hide controls on form2. I cant seem to get access to the controls on from2 to hide them unless i create another instance from within form1 which i dont want to do. i just want to use the one creted when the program starts up. Any ideas?