如何隐藏及显示任务栏？

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 FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long

Const SWP_HIDEWINDOW = &H80 '隐藏视窗
Const SWP_SHOWWINDOW = &H40 '显示视窗

'在程序中若要隐藏任务栏

Private Sub Command1_Click()
Dim Thwnd As Long
Thwnd = FindWindow("Shell_traywnd", "")
Call SetWindowPos(Thwnd, 0, 0, 0, 0, 0, SWP_HIDEWINDOW)
End Sub

'在程序中若要再显示任务栏

Private Sub Command2_Click()
Dim Thwnd As Long
Thwnd = FindWindow("Shell_traywnd", "")
Call SetWindowPos(Thwnd, 0, 0, 0, 0, 0, SWP_SHOWWINDOW)
End Sub