when a form is minimized

I would like to find a way to perform an action when someone minimizes the form. I have some code to add an icon to the systray, but I only want to do it when the minimize the form. Is there a way to fire an event when the user minimizes the window? I can't seem to figure out how to do that. All that I can find in MSDN is how to set either set the form as minimized at run-time or how to have the minimize button on the form or not. Any help pointing me to the right direction would be helpful.

This code is from another post. Could you adapt it. It checks the
WindowState in the resize_event.

Private Sub Form_Resize()
Static Hidden As Boolean
On Error Resume Next
If Not hidden Then
If Me.WindowState = vbMinimized Then
Me.Hide
Hidden = True
End If
Else
Me.WindowState = vbNormal
hidden = False
End If
End Sub

In the Form_Resize event handler, check whether or not WindowState = vbMinimized.