>OK, here's the really, really odd thing. If I instance the DLL from VB, it works. From VFP, it doesn't. Oh well, switched over to PCOUNT() and it works everywhere then, so I guess I'll just fuggedaboudit.

Installed SP4 yet? I've got it installed used the following, and after registering it, seems to work fine with VFP

DEFINE CLASS Foo AS CUSTOM OLEPUBLIC
  cResult = ""
  
  PROCEDURE FooMethod(cFoo)
    
    IF PARAMETERS() < 1
      This.cResult = "No Parameters passed"
    ELSE
      This.cResult = "Parameters passed - " + TRANSFORM(PCOUNT())
    ENDIF
  ENDPROC
ENDDEFINE