Hi Nerissa,

>Is there a function that tests whether a form is open or not?

the most generic way would be to scan the _SCREEN.Forms collection and compare the names of the forms with the name you're looking for:

LOCAL loFoundForm, loForm
loFoundForm = .NULL.

FOR EACH loFORM IN _SCREEN.Forms
  IF UPPER(loForm.Name) == "MYFORMNAME"
     loFoundForm = loForm
     EXIT
  ENDIF
ENDFOR

IF NOT ISNULL(loFoundForm)
  *-- loFoundForm contains a reference to the found form
ENDIF

In MM you can also ask the MM Forms Collection:

loFoundForm = goApp.oForms.Get("MYFORMNAME")
IF NOT ISNULL(loFoundForm)
  *--
ENDIF

HTH,
Armin