如何呼叫Windows.hlp [For Win NT 2000](編號:8626)

下列程式碼要呼叫呼叫winnt裡Windows.hlp會產生錯誤
請問各位先進如何 設定有標記●程式碼。謝謝。
Private Sub cmdHelp_Click()
Dim fso As New Scripting.FileSystemObject
  Dim lngReturn As Long
  Dim strWindowsFolder As String
  Dim strSystemFolder As String
  Dim strHelpFile As String
  Dim strHelpFile_NT4 As String
    
  ' For Windows 95,98.
  strWindowsFolder = fso.GetSpecialFolder(WindowsFolder)
  strHelpFile = strWindowsFolder & "\Help\Windows.hlp"
  
  ' For Windows NT, 2000
  strSystemFolder = fso.GetSpecialFolder(SystemFolder)
  strHelpFile_NT4 = strSystemFolder & "\Windows.hlp"
  
●lngReturn = WinHelp(Me.hwnd, strHelpFile_NT4, HELP_PARTIALKEY, "ShutDown")
End Sub