constants ExpandButtonEnum
Defines how the control displays the expanding/collapsing buttons.

NameValueDescription
exNoButtons0 The control displays no expand buttons.
exPlus-1 A plus sign is displayed for collapsed items, and a minus sign for expanded items.( )
exArrow1 The control uses icons to display the expand buttons.( )
exCircle2 The control uses icons to display the expand buttons. ( )
exWPlus3 The control uses icons to display the expand buttons. ( )
exCustom4 reserved