TreeView controls
When LinesAtRoot is enabled, PowerBuilder will connect all root items in a TreeView with lines.
To specify that root items in a TreeView are connected:
Select the Lines At Root check box on the General page of the control’s property page.
The LinesAtRoot property takes a boolean value.
The following line specifies that all root items in a TreeView are connected.
tv_1.LinesAtRoot = TRUE
