>I have a form which requires a parameter be passed to it. What I tried was
>
>LPARAMER lcstkno
>
>IF PCOUNT() = 0
> WAIT WINDOW 'message'
> Thisform.Release
>ELSE
> setup code
>ENDIF
>
>It does not work. Why not? What is correct method of aborting the form?

Return False in the method INIT.

* Init
LPARAMER lcstkno
IF PCOUNT() = 0
   WAIT WINDOW 'message' NOWAIT
   RETURN .F.
ELSE
   * setup code
ENDIF