i needed to prevent the users of a program from copying anything (like coping any file or some texts) during the time the program runs. so i made the program to empty the clipboard on every half a second. but they still can copy something by "dragging and dropping". even when i emptied the clipboard, the drag and drop operation works. when dragging and dropping, isn't the data is copied to the clipboard? then how can i prevent the user from coping something by d & d?
thanx for any help.