Hello,

you could speed it up a bit
here are some tips ..

-work directly with the Nodes Collection to add nodes ..
-move the treeview off the screen before adding nodes (this speeds up treeview's internal repainting)

e.g.

LOCAL loTree, loNodesCol, lnOldLeft, lnOldTop

loTree = THISFORM.SomeTreeView
loNodesCol = loTree.Nodes

THISFORM.LockScreen = .T.

lnOldLeft = loTree.Left
lnOldTop = loTree.Top
loTree.Left = 10000
loTree.Top = 10000

SCAN
loNodesCol.Add(.......)
ENDSCAN

loTree.Left = lnOldLeft
loTree.Top = lnOldTop

THISFORM.Lockscreen = .F.

Regards

Christian