Binaryworld - GetTreeViewFirstVisibleNode - Retrieve the first visible node in a Tre ... [ VB -> Controls-TreeView ]

Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal _
  hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, _
  lParam As Any) As Long

Private Const TV_FIRST = &H1100
Private Const TVM_GETNEXTITEM = (TV_FIRST + 10)
Private Const TVM_SELECTITEM = (TV_FIRST + 11)
Private Const TVGN_CARET = 9
Private Const TVGN_FIRSTVISIBLE = &H5

' Return the first visible node of a TreeView

Function GetTreeViewFirstVisibleNode(ByVal TV As TreeView) As Node
  Dim hItem As Long
  Dim selNode As Node

  ' remember the node currently selected
  Set selNode = TV.SelectedItem
  ' get the handle of the first visible Node
  hItem = SendMessage(TV.hWnd, TVM_GETNEXTITEM, TVGN_FIRSTVISIBLE, ByVal 0&)
  ' make it the selected Node
  SendMessage TV.hWnd, TVM_SELECTITEM, TVGN_CARET, ByVal hItem
  ' return the result as a Node object
  Set GetTreeViewFirstVisibleNode = TV.SelectedItem
  ' restore node that was selected
  Set TV.SelectedItem = selNode

End Function