Hide\Show TaskBar

'Add a module to your project (In the menu choose Project -> Add Module, Then click Open)
'Insert 2 CommandButtons to your form (named Command1 and Command2).
'When you will press the First button the Taskbar will Disappear.
'To show the TaskBar again press the second button.
'Insert this code to the module :

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

'Insert the following code to your form:

Private Sub Command1_Click()
hwnd1 = FindWindow("Shell_traywnd", "")
Call SetWindowPos(hwnd1, 0, 0, 0, 0, 0, SWP_HIDEWINDOW)
End Sub

Private Sub Command2_Click()
hwnd1 = FindWindow("Shell_traywnd", "")
Call SetWindowPos(hwnd1, 0, 0, 0, 0, 0, SWP_SHOWWINDOW)
End Sub