What's a linked window?

I'm trying to familiarize myself with Visual Basic Add-In Model. I don't understand what LinkedWindowFrame and LinkedWindows properties mean. Could so开发者_如何学Cmeone kindly explain a little bit? Thank you!

Edit: There's a definition as follows:

linked window

A window that is joined to another window other than the main window.

But I don't think I've ever seen anything as described... :(

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From VS6.0 Documentation

Linked window frames contain all windows that can be linked or docked. This includes all windows except code windows, designers, the Object Browser window, and the Search and Replace window.window.

So a LinkedWindow is any sort of tool window that can belong to a LinkedWindowFrame. Windows belonging to the same LinkedWindowFrame are docked together.