Detect keydown when hidden

[dlern]

I need to detect when a combination of keys is pressed when the form is hidden

Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)
 If KeyCode = vbKeyTab And Shift = 2 Then
   MsgBox "hi"
   End If
End Sub

Works fine when the form is visable, but will not work when the form is hidden (this code detects when ctrl and tab are pressed together)

Any ideas?