As Long, lParam As Long) As Long

Private Declare Function GetWindowLong Lib "User32" Alias "GetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long) As Long

Private Declare Function SetWindowLong Lib "User32" Alias "SetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal

dwNewLong As Long) As Long

Private Const GWL_STYLE = -16&
Private Const TVM_SETBKCOLOR = 4381&
Private Const TVM_GETBKCOLOR = 4383&
Private Const TVS_HASLINES = 2&

Dim frmlastForm As Form

Private Sub Form_Load()
Dim nodX As Node
Set nodX = TreeView1.Nodes.Add(, , "R", "Root")
Set nodX = TreeView1.Nodes.Add("R", tvwChild, "C1", "Child 1")
Set nodX = TreeView1.Nodes.Add("R", tvwChild, "C2", "Child 2")
Set nodX = TreeView1.Nodes.Add("R", tvwChild, "C3", "Child 3")
Set nodX = TreeView1.Nodes.Add("R", tvwChild, "C4", "Child 4")
nodX.EnsureVisible
TreeView1.style = tvwTreelinesText ' Style 4.
TreeView1.BorderStyle = vbFixedSingle
End Sub

Private Sub Command1_Click()
Dim lngStyle As Long
Call SendMessage(TreeView1.hWnd, TVM_SETBKCOLOR, 0, ByVal RGB(255, 0, 0))
'改变背景到红色

lngStyle = GetWindowLong(TreeView1.hWnd, GWL_STYLE)
Call SetWindowLong(TreeView1.hWnd, GWL_STYLE, lngStyle - TVS_HASLINES)
Call SetWindowLong(TreeView1.hWnd, GWL_STYLE, lngStyle)
End Sub

Option Explicit