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Level 0 Widget

 
The first level of the widget hierarchy is the one just below the screen level, and is called level-0. You create a level-0 widget by not using the PARENT option to the ASSIGN command when you create the widget.
 
A level-0 widget is not constrained to be within another widget and may exist at any place within the HTBasic output window. The X and Y coordinates of the level-0 widget are relative to the upper-left corner of the HTBasic output window.
 
A level-0 widget has a title bar at the top and a resize border around it. You can assign most of the widgets to be level-0 widgets. (All dialogs are level-0.) Only level-0widgets can have a title bar on top of the widget, and a resize border around the widget. The title bar and resize border allow you to change the position and size of the widget.
 
All widgets, with the exception of CASCADE MENU, MENU BUTTON, MENU SEPARATOR, MENU TOGGLE, PULLDOWN MENU, and SEPARATOR, can be level-0 widgets.