Retrieves or sets a value indicating the column's index where the hierarchy will be displayed.
|Long||A long expression that indicates the index of the column where the control's hierarchy is displayed.|
Use the TreeColumnIndex property to change the column's index where the hierarchy lines are painted. Use HasLines and LinesAtRoot properties to show the hierarchy lines. Use the HasButtons property to define the +/- signs appearance. If the TreeColumnIndex property is -1, the control doesn't paint the hierarchy. Use the Indent property to define the amount, in pixels, that child items are indented relative to their parent items.