This method will be called when the DockWindow is not visible and is shown in response to the user clicking the associated button on the ArcGIS Explorer Ribbon. If the DockWindow is already open, then clicking the associated button will cause the DockWindow to gain focus and the OnActivate method will be called, but in this case the OnShow method will not be called. The corresponding OnHide()()() method is called when the DockWindow is hidden.

A common use of this method is to update the DockWindow user interface when the window is shown for the first or subsequent times.