Just to give you an example, my unaltered .EXE weighs in at about 10 meg. I removed the source code as per Walters instructions and packed the class libraries and the resulting .EXE was abut 4 meg. This is even though I had to leave the source code in the libraries which automatically recompile.

I am still interested in hearing from anybody who knows how VFP decides what needs recompiling and what doesn't when an EXE is built!