Hi Gustav Mulder,
Yes, they can. From a UI points of view, a user can dock a ToolWindow on top of other ToolWindow by dropping the first ToolWindow in the center of the docking guide compass
that appears for the second ToolWindow.
If you want to do this programmatically, just call the DockWindow method as it is mentioned here
. Please note that you should pass the DockPosition.Fill
as a third parameter.
If you have additional questions, feel free to contact me.
the Telerik team