>
>What's the best way to sub-class a PRG based class?
>



assuming You have

PARENT.PRG

DEFINE class MyClass as Session

  bla

ENDDEFINE

DEFINE class AnotherClassOfMe as Session

  trallala

ENDDEFINE

EOF PARENT.PRG

I would do

if atc("PARENT", set("PROCEDURE")) = 0
    set procedure to PARENT.PRG additive
endif

DEFINE class MyChild as MyClass
   nNewProp = 0
   cAnother = "Hi Bill"

ENDDEFINE

or

DEFINE class MyChild as MyClass of <PATH>PARENT.PRG
   nNewProp = 0
   cAnother = "Hi Bill"
ENDDEFINE

I'm always using .PRG extensions and never had any problems so far.

I'm not even sure that, if You call the .fxp (i.e. the compiled version)
the prg gets recompiled at all from the project-manager - maybe an interesting
point I never thought about up to now.

HTH