>This is the third company I've worked at where VFP is being replaced with VB. The last three companies I've interviewed with says they are phasing out their VFP systems and replacing them with something else.

Don't worry, VB isn't so bad. You've got a couple of choice.
1) Learn VB on the company's coin. Be happy that you've acquired a new skill
or
2) Move on.
or
3) Show the boss a few places where VFP can fit into the corporate architecture. (raw query speed, Windows RAD, licence free client install)