vb6 ListBox横向滚动条

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 Declare Function SetWindowPos Lib "user32" _
   (ByVal hwnd As Long, ByVal hWndInsertAfter As Long, _
    ByVal x As Long, ByVal y As Long, ByVal cx As Long, _
    ByVal cy As Long, ByVal wFlags As Long) As Long
Private Declare Function SendMessageLong Lib "user32" Alias "SendMessageA" _
   (ByVal hwnd As Long, ByVal wMsg As Long, _
    ByVal wParam As Long, ByVal lParam As Long) As Long
     'api声明
   
Private Const GWL_STYLE = (-16)
Private Const SWP_NOACTIVATE = &H10
Private Const SWP_NOCOPYBITS = &H100
Private Const SWP_NOMOVE = &H2
Private Const SWP_NOOWNERZORDER = &H200
Private Const SWP_NOREDRAW = &H8
Private Const SWP_NOREPOSITION = SWP_NOOWNERZORDER
Private Const SWP_NOSIZE = &H1
Private Const SWP_NOZORDER = &H4
Private Const SWP_SHOWWINDOW = &H40
Private Const SWP_FRAMECHANGED = &H20
Private Const WS_HSCROLL = &H100000
Private Const LB_SETHORIZONTALEXTENT = &H194
Private Const LB_GETHORIZONTALEXTENT = &H193
      '常量声明


Private Sub Form_Load()
Dim Information#, Scrollbar#

   For Information = 1 To 88
      List1.AddItem _
         "横滚动条示范横滚动条示范横滚动条示范横滚动条示范横滚动条示范横滚动条示范" & _
         "横滚动条示范横滚动条示范横滚动条示范横滚动条示范横滚动条示范横滚动条示范" & _
         "横滚动条示范横滚动条示范横滚动条示范横滚动条示范横滚动条示范横滚动条示范"
   Next Information
   
   Information = SendMessageLong(List1.hwnd, LB_SETHORIZONTALEXTENT, 2000, 0)
                                                                    '2000:控制横滚动条的范围(建议值2000-3000)
   Scrollbar = GetWindowLong(List1.hwnd, GWL_STYLE)
   Scrollbar = Scrollbar Or WS_HSCROLL
   SetWindowLong List1.hwnd, GWL_STYLE, Scrollbar
   SetWindowPos List1.hwnd, _
      0, 0, 0, 0, 0, _
      SWP_NOMOVE Or SWP_NOOWNERZORDER Or SWP_NOSIZE Or SWP_FRAMECHANGED
   
End Sub