Category Collapse/Expand Buttons

Categories can display buttons that allow users to collapse and expand their child rows.

The table below contains properties that affect element appearance.

Visibility	The BaseOptionsView.ShowCollapseButtons and BaseRow.ShowCollapseButton properties.
Paint style	The VGridControlBase.TreeButtonStyle property.
Appearance	The VGridAppearanceCollection.CategoryExpandButton property.
Custom Draw Event	The VGridControlBase.CustomDrawTreeButton event.