OptionalextExtensions a producer wrote on the control's own properties, as markup.
OptionalformThe control's own properties as the file spelled them, less the ones modeled.
OptionalmacroThe name of the macro the control runs when used.
OptionalpropsThe control's placement properties as the file spelled them, less the ones modeled and the anchor, which is the movable's own.
OptionalshapeThe id of the shape that draws this control.
OptionalxmlAnything a producer wrote inside the placement properties besides the anchor, as markup. Empty for every file seen so far.
What every kind saves. Each facet and each kind adds its own fields.