Tree-ExpandItem

Function Name dcl-Tree-ExpandItem
Syntax   (dcl-Tree-ExpandItem <CONTROL> Item [as Handle or String] Action [as Integer])
Return Type Boolean (T if successful; otherwise NIL)
Applies To Tree

This method expands or collapses the specified item.

Action Result
-1 Collapses item
0 Toggles expanded state
1 Expands item