There should be a method which allows the user to host a Form in a HostWindow. This will come in handy when there is a save/load layout scenario.

Resolution: 
Use the DockControl method to host a form. Here is the code snippet: 
Form form = new Form8();
this.radDock1.DockControl(form, Telerik.WinControls.UI.Docking.DockPosition.Left);