ImageDeskToForm

Declare Function BitBlt Lib "gdi32" _
(ByVal hDestDC As Integer, ByVal x As Integer, _
ByVal y As Integer, ByVal nWidth As Integer, _
ByVal nHeight As Integer, ByVal _
hSrcDC As Integer, ByVal xSrc As Integer, _
ByVal ySrc As Integer, ByVal dwRop As _
Long) As Integer
Declare Function GetDesktopWindow Lib "user32" () As Long
Declare Function GetDC Lib "user32" _
(ByVal hwnd As Long) As Long
Public Const SRCCOPY = &HCC0020
Public Const SRCAND = &H8800C6
Public Const SRCINVERT = &H660046
'Form Code

Set the Form properties to the following:
AutoRedraw True
BorderStyle 0 - None
WindowState 2 - Maximized
Now, add the following code to the form:
Private Sub Form_Load()
Dim DeskhWnd As Long, DeskDC As Long
'Get the hWnd of the desktop

DeskhWnd& = GetDesktopWindow()
'BitBlt needs the DC to copy the image. So, we

'need the GetDC API.

DeskDC& = GetDC(DeskhWnd&)
BitBlt Form1.hDC, 0&, 0&, _
Screen.Width, Screen.Height, DeskDC&, _
0&, 0&, SRCCOPY
End Sub

Add a command button to the form with following code:
Private Sub Command1_Click()
Unload Me
End
End Sub