NAME: findtopid PURPOSE: retrouve a partir d''un Id de widget l'Id du widget qui est "the top-level base" (i.e., it has no parent) CATEGORY: aide pour les widgets CALLING SEQUENCE: res=findtopid(Widget_ID) INPUTS: Widget_ID: this argument should be the widget ID of the widget for which information is desired. KEYWORD PARAMETERS: OUTPUTS: l'Id du widget qui est "the top-level base" COMMON BLOCKS: SIDE EFFECTS: RESTRICTIONS: EXAMPLE: