Gets the rectangle where the column caption is intended to be drawn.
A System.Drawing.Rectangle structure specifying the bounding rectangle of the header's text.
By default, column headers can contain caption text and an image used to display sort order implemented by this column's values. The TreeList.CustomDrawColumnHeader event facilitates your ability to paint these elements. It provides a CaptionRect and CustomDrawColumnHeaderEventArgs.SortShapeRect parameter properties which specify rectangles where mentioned elements are intended to be painted. Column header text is designed to be drawn to the left of column headers. The image indicating sort order is designed to be painted to the right of it.