I like the idea of running kix32.exe in command mode. You could either have:

kix32.exe /p "command"

or

kix32.exe /cmd

This would start a commandline session that would allow you to type in and execute code a line at a time (REXX allows this). alternately, you could do a

kix32.exe /cmd /out="C:\test.kix"

This would allow you to save the actual lines that you are testing to an output file. The "ESC" key could always be used to cancel out and end the commandline execution.

Brian