Public Const SW_HIDE = 0
Public Const SW_SHOW = 5
Public Declare Function ShowWindow Lib "user32" Alias "ShowWindow" (ByVal hwnd As Long, ByVal nCmdShow As Long) As Long
. . .
Dim x as Long
x = ShowWindow(Me.hWnd, SW_HIDE)
(I think this might actually hide the whole window, though... Try it with a timer to run the command with SW_Show, so that you don't lose control of the app if it does hide it altogether...)