If you want to hide the taskbar this will do it:
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As IntPtr
Private Declare Function ShowWindow Lib "user32" Alias "ShowWindow" (ByVal hWnd As IntPtr, ByVal cmdShow As Boolean) As Boolean
Private Const SW_HIDE = 0
Private Const SW_SHOW = 1
Private hTaskBar As IntPtr
Public Sub Main()
hTaskBar = FindWindow("Shell_TrayWnd", "")
ShowWindow(hTaskBar, SW_HIDE)
ShowWindow(hTaskBar, SW_SHOW)
End Sub