I did few experiments and it seems like it does not support regular expression. Not even simple wild cards.
Fortunately you can construct the first argument of selectitem method on the fly. Say if the screen capture that you provided is a list view, you can do something like:
Dim lv As TListView
Set lv = ListView("Index=1") 'change this to your lv index
Dim sLastNode As String
sLastNode = lv.GetItem(1, 1) + "-" + lv.GetItem(1, 3) + "," + lv.GetItem(1, 2)
[Some Treeview].SelectItem "\Applications\Search\" + sLastNode