CopyNodesbetwTrees

Option Explicit
Private Sub Command1_Click()
CopyTreeview TreeView1, TreeView2
End Sub
'_________________________________________________________


Private Sub CopyTreeview(objTVSrc As TreeView, objTVDest As TreeView)
'Copies the source treeview to a destination

'treeview. Assumes that both treeviews use the

'same (or identical) Imagelists.

Dim nodeRoot As Node
objTVDest.Nodes.Clear
For Each nodeRoot In objTVSrc.Nodes
If (nodeRoot.Parent Is Nothing) Then
Call CopyTVParentNode(nodeRoot, objTVDest.Nodes)
End If
Next
End Sub
'_________________________________________________________


Private Sub CopyTVParentNode(nodeParent As Node, nodesDest As Nodes)
'Walks the specified source parent treeview node,

'and all of it's children nodes, adding them to the

'specified destination Nodes collection.

'

'nodeParent: parent node to walk and copy from

'nodesDest : destination Nodes collection to copy to

Dim nodeDummy As Node
Dim nodeChild As Node
'First add the parent node to the destination nodes collection.

Set nodeDummy = CopyNode(nodeParent, nodesDest)
'Get the current parent node's first child

Set nodeChild = nodeParent.Child
'Now walk through the current parent node's children

'appending the current child node's text to the passed string

Do While Not (nodeChild Is Nothing)
'If the current child node has it's own children...

If nodeChild.Children Then
'Recursively call this proc copying all of it's children

'(it becomes the new parent node)

Call CopyTVParentNode(nodeChild, nodesDest)
Else
'Add the child node to the destination nodes collection.

Set nodeDummy = CopyNode(nodeChild, nodesDest)
End If
'Get the current child node's next sibling

Set nodeChild = nodeChild.Next
Loop
End Sub
'_________________________________________________________


Private Function CopyNode(nodeSrc As Node, nodesDest As Nodes) As Node
With nodeSrc
If (.Parent Is Nothing) Then 'Root node
Set CopyNode = nodesDest.Add(, , _
.Key, .Text, _
.Image, .SelectedImage)
CopyNode.Expanded = True
Else 'Child node
Set CopyNode = nodesDest.Add(.Parent.Index, _
tvwChild, _
.Key, .Text, _
.Image, .SelectedImage)
CopyNode.Expanded = True
End If
End With
End Function