Option Explicit 
 
Private Declare Function FindWindow Lib "user32" _
Alias "FindWindowA" (ByVal lpClassName As String, _
ByVal lpWindowName As String) 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 Const SWP_SHOWWINDOW = &H40
Private Const SWP_HIDEWINDOW = &H80

Private Sub Command1_Click()
'ausblenden 
    Dim lWnd As Long 
    lWnd = FindWindow("Shell_TrayWnd", "")
 
    SetWindowPos lWnd, 0, 0, 0, 0, 0, SWP_HIDEWINDOW
 
End Sub 
 
Private Sub Command2_Click()
' einblenden 
    Dim lWnd As Long 
    lWnd = FindWindow("Shell_TrayWnd", "")
 
    SetWindowPos lWnd, 0, 0, 0, 0, 0, SWP_SHOWWINDOW
 
End Sub 
 
Private Sub Form_Load()
'initialisieren 
    Command1.Move 120, 120, 1695, 375
    Command1.Caption = "Ausblenden"
    Command2.Move 120, 600, 1695, 375
    Command2.Caption = "Einblenden"
 
End Sub