Hi, to raise my C# usage i try to re-create an MFC MDI App. I want dockable toolbars like i implemented (with quite a lot of tweaking) in C++ with MFC. I didn't find any C# reference for doing this but a few approaches which don't do the things the way i'd like them to. One approach is using the Dock property of System.Windows.Forms.Form. But that actually puts the toolbar inside the MDI client without resizing the client area (like MFC does). This lets you drag the MDI forms over (and behind) the toolbar. I tried to manually resize the MDI client size but for some reasons C# won't do that (this is prevented inside the MDI client as far as i was able to find out). Is there any solution to this? Basically i want draggable, dockable toolbars which show their content during dragging; no XOR outlines.