SftBox/OCX 5.0 - Combo Box Control

Expand/Collapse Buttons

Expand/collapse buttons are optional buttons displayed on the tree lines (see ButtonStyle and Items.TreeLineStyle) to allow users to expand and collapse sections by clicking a button. The button graphics can be modified using the ButtonPicture property and are shared between all items. Items on level 0 (the highest level or root level) have special level 0 expand/collapse buttons which can be enabled separately, but share the same graphics.