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### Form Geometry Manager

In addition, `Tix` augments Tk by providing:

tixForm
  Tix adds a form geometry manager based on attachment rules.

Wm
  an addition to the standard TK `wm` command for reparenting windows.

Some of these widgets are implemented by Tix in ``C'', such as the HList and Tree widgets, but in fact, very few new widgets at the "C" level are introduced by Tix; most are compound widgets of existing Tk widgets. They are all created using the simple object oriented programming (OOP) framework for writing mega-widgets called the Tix Intrinsics.