Click to the background of the form, not to any object(like textbox, button etc) and then at the properties windows, which should be at bottom right, search for "AllowDrop" sorry i dont have time to upload a pic.
i found it thnx for the help now im gonna go and work on the insim more i just downloaded a cruise insim i found here on the forums and trying to get my skils better wel with some help ofcourse