Sorry for the previous question! The Form.B event is fired arter finish Form.A method.
So, you can use PROGRAM(1) at the form.B to identify if this event is fired from form.A. If it is, do not call to form.A method.
Example:
If Not ("A" $ Program(1))
thisform.A
EndIf
Note: Please, to make sure, check the sintax of PROGRAM
Lic. Esteban Bruno
Gerente de Sistemas
TASSO S.R.L.