Hi; I'm not sure for what kind of apps you would want to program the R75, but there are several packages that support it. Included in this would
be Scancat (by Jim Springer) and Smart R75 Control
(by an old friend to the hobby, Mark Fine).
Check out my software page at Strongsignals, and
start checking out the various packages listed there.
the URL is: http://strongsignals.net/access/content/software.html
73s Mike email@example.com