Option Explicit

      Private Sub Command1_Click()
         Dim lR As Long
         lR = SetTopMostWindow(Form1.hwnd, True)
      End Sub

      Private Sub Command2_Click()
         Dim lR As Long
         lR = SetTopMostWindow(Form1.hwnd, False)
      End Sub

      Option Explicit
      Public Const SWP_NOMOVE = 2
      Public Const SWP_NOSIZE = 1
      Public Const FLAGS = SWP_NOMOVE Or SWP_NOSIZE
      Public Const HWND_TOPMOST = -1
      Public Const HWND_NOTOPMOST = -2

      Declare Function SetWindowPos Lib "user32" Alias "SetWindowPos"  _
            (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

      Public Function SetTopMostWindow(hwnd As Long, Topmost As Boolean) _
         As Long

         If Topmost = True Then 'Make the window topmost
            SetTopMostWindow = SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, _
               0, FLAGS)
         Else
            SetTopMostWindow = SetWindowPos(hwnd, HWND_NOTOPMOST, 0, 0, _
               0, 0,FLAGS)
            SetTopMostWindow = False
         End If
      End Function