constants LinesAtRootEnum
Defines how the control displays the lines at root. The LinesAtRoot property defines the way the tree lines are shown. The HasLines property defines the type of the line to be shown. The HasButtons property defines the expand/collapse buttons for parent items. 

The LinesAtRootEnum type support the following values:

NameValueDescription
exNoLinesAtRoot0 No lines at root items.

exLinesAtRoot-1 The control links the root items.

exGroupLinesAtRoot1 The control shows no links between roots, and divides them as being in the same group.

exGroupLines2 The lines between root items are no shown, and the links show the items being included in the group.

exGroupLinesInside3 The lines between root items are no shown, and the links are shown between child only.

exGroupLinesInsideLeaf4 The lines between root items are no shown, and the links are shown for first and last visible child item.

exGroupLinesOutside5 The lines between root items are no shown, and the links are shown for first and last visible child item. A parent item that contains flat child items only, does not indent the child part. By a flat child we mean an item that does not contain any child item.