User controls at design time

Question

I am creating a UserControl that has an area for users to add additional controls to at design time. Is there a way to force the controls being added to go to a certain area or maybe a panel when they are dropped on the control in the designer? What I really need is a way to change the location of the client rectangle of my control or to override the Controls.Add (at design time) and add the controls to a panel. Any help or hints would be appreciated.