Hello, I have Windows Forms C# desktop app with docked window layout. Ie. few document window and few tool windows. In that case I used WeifenLuo.WinFormsUI.Docking library. My question is what is best way to realize event handling after document content change. Let's consider case. We can change content in active document window and we can just change active document window. In both cases tool windows should be refreshed based on active document window content (item selected ie.)