Thanks to all for the help.

The best helps I found were

        http://www.lammertbies.nl

and

        ftp://ftp.psyber.com/tcj/faqs/asyam.zip

(the latter is some truly NICE and POWERFUL code)

Andy

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Andy Kunz               Life is what we do to prepare for Eternity
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andy@rc-hydros.com      http://www.rc-hydros.com     - Race Boats
andy@montanadesign.com  http://www.montanadesign.com - Electronics
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