lemme try ...
here goes the hierarchy of the Treeview in my window
lets assume that the control name of the treeview (Contact) is contactTreeView
so the initialisation should go like this
White.Core.UIItems.TreeItems.Tree newTree= window.Get<White.Core.UIItems.TreeItems.Tree>("contactTreeView")
so u if u want to trigger a click event on the ---Temprory node inside --Address node the code goes like this
newTree.node("Address","Temporary").Click(); // params inside this method are just the caption of each node
i am not sure abt the Custum controls but i believe when ur window get loaded if you are giving only the treeView Item name it should work in white .. give a try...