SNIP
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>For those who does not know Calvin, he is the lead programmer of Visual FoxPro at Microsoft, and without any doubt the person who knows most about how Visual FoxPro works internally. According to Ken Levy he has all the millions of source code for VFP in his head.

I'll bet he **DOES** have all the source code in his head!

Many many years ago, in my mainframe days, I would meet the person from IBM who wrote "HASP", which was a critical component of the operating system. When people would describe a problem to hime he would say " In the Xxxxx module, go to line 247 and change the yFunction to a zFunction and that will do it".
The guy was amazing, and I've heard Calvin is amazing too.

cheers