The functionality you are looking for when sending is called SendKeys on Windows. I don't know about capturing output from GUI programs, but I would probably try to cut and paste it into the clipboard, and from there to a logfile opened in notepad or something like this.

For an extremely simple-minded approach to this, you might try this little sendkeys script (in VB Script) I wrote a while ago to automate little tasks in GUI apps, e.g., when working from a Makefile (hacking Visual Basic in Emacs is crap without the usual compile buffer ... ).

The syntax for special keys can be found on pages 213-214, table 7.2 of Windows Script Host. I added a directive {DELAY milliseconds}, where milliseconds is an integer number of milliseconds to sleep. This can be used to make the script wait for a certain time, which is vital when automating GUI programs on Win32 platforms.

Christian Lemburg
Brainbench MVP for Perl
http://www.brainbench.com