Is it possible to copy treenodes between treeviews using drag and drop?

I can easily move a node from tree1 to tree2, but I can't get it to stay in tree1.

I've used example code from: http://www.codeproject.com/vb/net/Tr...ragAndDrop.asp

Changing the e.Effect = DragDropEffects.Move into Copy wasn't enough, and removing the line "dropNode.Remove()" also doesn't work, it makes the drag en drop unresponsive.

Any help would be appreciated.