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## The FORMS Library

Geomview itself is written using Mark Overmar's public domain FORMS library. FORMS is a handy and relatively simple user interface toolkit for IRISes. Many Geomview external modules, including the examples in this manual, use FORMS to create and manage control panels.

We distribute a version of the FORMS library with Geomview because it is necessary in order to compile Geomview and many of our modules. If you use FORMS to write Geomview modules (or anything else, for that matter) you may use this copy. The header file ``forms.h'` is in the ``include'` subdirectory, and the library file ``libforms.a'` is in the ``lib/sgi'` subdirectory. In particular, you can link the example modules in this manual using this copy.

FORMS is available via ftp on the Internet from a variety of sites, including `cs.ruu.nl` or `glaurung.physics.mcgill.ca`. It comes with source code and extensive documentation.

If you wish you may use any other interface toolkit instead of FORMS in an external module. We chose FORMS because it is free and relatively simple.

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