How to implement a tooltip popup

[Lothar Scholz <llothar web de>]

Hello,

How can i create a toplevel window without any decoration and which
will never get the keyfocus and goes away if the user clicks somewhere
outside the window.

This is for example used in IDE's to display call tips and other
informations while you type.
  

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Best regards,
 Lothar                          mailto:llothar web de