property Group.AllowScroll as Boolean
Enables or disables scrolling the group when it is expanded or collapsed.

TypeDescription
Boolean A boolean expression that specifies whether the control uses the animation when a group is expanded or collapsed. 

By default, the AllowScroll property is True. Use the AllowScroll property to specify whether the group is scrolled smoothly until all items are visible when the user clicks the group's caption. Use the DelayScroll property to specify the delay used when the user selects a group. Use the AllowScroll property on False, when the group hosts an ActiveX control or another window.