Help gets the Window Handle of a Windows Window
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about HWND (Windows)

Microsoft windows uses window handles internally to access the windows. Each window has a specific arbitrary number. Doing arithmetic with that number them will get unpredictable results. Use the HWND node to get the handle of a window with a given title (shown in the title area of the window). HWND will retrive all windows with a given title. this might be more powerful as you like - for example there are manymany__ windows with just an empty title. You might absolutely like to use GetSlice here.

See ShowWindow (Windows) or SendMessage (Windows) to actually *do* things with these Handles