Hide some window state menu items

You'd have to implement the menus yourself instead since that is built in functionality. You can handle the WindowContextMenu event and display your own menu and cancel ours. You can use methods like ToolWindow.IsMenuItemEnabled and other similar ones to determine how to display items.

Thanks!
You clarified the issue.

And another question about window menu.
Is it possible to disable 'Dockable' menu item for a tabbed document? The tabbed document cannot be docked anywhere, but still menu 'Dockable' is not greyed. When I choose 'Dockable', window docks to left side and cannot be docked anywhere else except it's normal position in the middle.
I would like to have 'Floating', 'Dockable' and 'Auto-hide' disabled for document windows. Only 'Tabbed document' and 'Hide' enabled.

And yet another question: as I understand 'Hide' menu item is controlled only thru CanClose property of a ToolWindow. Is it right?

Thanks!

You shouldn't be seeing a Dockable menu item for document windows. In our sample, you will see that document windows only show a Close option and new tab group options. You will see a Dockable menu item for tool windows that are in the MDI area. So it sounds like you are really using a tool window and not a document window in the MDI area. But in that case you will also see all the other options like Floating, etc. for a tool window.

Yes the Hide menu item for tool windows is controlled by CanClose. CanClose also controls whether a document window's Close menu item is enabled.

You were right! I was using ToolWindow instead DocumentWindow :-)
Now everything's ok.

Thanks again!