The
  LinesAtRootEnum type support the following values:


| Name | Value | Description | |||
| exNoLinesAtRoot | 0 | 
No lines at root items.
 
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| exLinesAtRoot | -1 | 
The control links the root items.
 
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| exGroupLinesAtRoot | 1 | 
The control shows no links between roots, and divides them as being in the same
group.
 
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| exGroupLines | 2 | 
The lines between root items are no shown, and the links show the items being
included in the group.
 
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| exGroupLinesInside | 3 | 
The lines between root items are no shown, and the links are shown between child
only.
 
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| exGroupLinesInsideLeaf | 4 | 
The lines between root items are no shown, and the links are shown for first and
last visible child item.
 
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| exGroupLinesOutside | 5 | 
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.  
 
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