If you Get this property, the text string will be formatted as MegaWindow's syntax requires. For more information, see the card 'The ObjectList'. ScriptList is a return-delimited list of all the objects' Scripts, one per line. You can just as easily Get or Set each object's Script individually, but if you want them all at once, use this. For more info, see the card 'MW Messages'.
Storage is simply a text string of any length, and can be used for any purpose.
ObjectCount is Get only, and gives you the number of the last object in the window. CurrTextBox is Get only, and gives you the number of the textfield currently being edited. If no TextEdit box in the window is being edited, it returns 0. DefaultBtnAvail is Get only. LastClickLoc is Get only, and returns the location of the last mouse click in coordinates local to the window.