For one of my projects I needed an inputbox with two text and combo box. Since you cannot do that with the Windows inpubox (and since I anyway find it ugly), I searched for alteratives. So I created my own. A global stringvar named ClipBd holds the data - so to say the programs private Clipboard.
A project is attached. Maybe somebody else finds it useful.
(If someone has a more elegant solution I'd love to get to know it.)