> second option: Replacing "yourname" with Thisform.Name will never let the form to start even for the first time. i.e. IF loForm.name = Thisform.Name will return always TRUE.

Sorry, I was dumb. Please try it again with the following code:

FOR EACH loForm IN _screen.forms
   IF loForm.name = thisform.name and loForm.visible
      * form already loaded
      messagebox("already loaded")
	  RETURN .F.
   ENDIF
ENDFOR

--
Eric den Doop
www.foxite.com - The Home Of The Visual FoxPro Experts