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Expand Button

Expand buttons enable end-users to expand or collapse parent nodes (nodes that have children). When a parent node is collapsed, the node’s expand button displays a ‘plus’ sign indicating that the node can be expanded by clicking the button. Once a node has been expanded, the node’s button displays a ‘minus’ sign.



The table below lists the main properties that affect the element’s appearance:


The TreeListOptionsView.ShowButtons option.


The TreeListAppearanceCollection.GroupButton property.

Note: the appearance settings are ignored if a Tree List is painted in WindowsXP or Office2003 style.

Custom Draw Event

The TreeList.CustomDrawNodeButton event.

Vertical Alignment

The TreeListOptionsView.ExpandButtonCentered property.

See Also