Doubt regarding Picture Box !!!

Question

hi all.... my question is simple.... i have created two window forms ( form1 and form2).... In form 1 , i kept one radiobutton ... In form 2, i kept one picture box.... My question is that , if i select that radiobutton in form1, i should make the picture box in form 2 either disabled or invisible..... how to do this????...... pls help..... thank u!!!!!!