In un modulo inserite questo 
Public Declare Sub keybd_event Lib "user32" (ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Long, ByVal dwExtraInfo As Long)
Public Const KEYEVENTF_KEYUP = &H2
Public Function ImmagineSchermo(Optional ActiveWindow As Boolean) As Picture
Dim Picture As StdPicture
Set Picture = Clipboard.GetData(vbCFBitmap)
If ActiveWindow Then
keybd_event vbKeyMenu, 0, 0, 0
End If
keybd_event vbKeySnapshot, 0, 0, 0
DoEvents
keybd_event vbKeySnapshot, 0, KEYEVENTF_KEYUP, 0
If ActiveWindow Then
keybd_event vbKeyMenu, 0, KEYEVENTF_KEYUP, 0
End If
Set ImmagineSchermo = Clipboard.GetData(vbCFBitmap)
Clipboard.SetData Picture, vbCFBitmap
End Function


Poi create una picture e inserite questo per visualizzare lo schermo nella picture 

Set Picture1.Picture = ImmagineSchermo()


Invece per visualizzare l'immagine della finestra attiva(form) 

Set Picture1.Picture = ImmagineSchermo(True)


Ciao by gius