Private Declare Function SetWindowPos Lib "user32.dll" (ByVal hwnd As IntPtr, _
  ByVal hWndInsertAfter As Int32, ByVal x As Int32, ByVal y As Int32, ByVal cx _
  As Int32, ByVal cy As Int32, ByVal wFlags As Int32) As Int32
 
    Private Const SWP_NOMOVE As Int32 = &H2
    Private Const SWP_NOSIZE As Int32 = &H1
    Private Const HWND_TOPMOST = -1      'bringt ein fenster an die oberste 
    ' stelle
    Private Const HWND_NOTOPMOST = -2    'bringt ein fenster an die unterste 
    ' stelle eines containers
    Private Const HWND_BOTTOM = 1        'bringt ein fenster an die unterste 
    ' position aller fenster

SetWindowPos(Me.Handle, HWND_BOTTOM, 0, 0, 0, 0, SWP_NOMOVE Or SWP_NOSIZE)