[AccessD] How to Close ActiveX Control called "Microsoft Web Browser"

We have just started to experiment with an ActiveX Control called
"Microsoft Web Browser" to initiate 
Internet Explorer from an Access Form.

We can fire up IE with the following VBA command.

Me.WebBrowser0.Navigate "www.cnn.com" 


This works nicely.

Now we would like to have a button with a little VBA code to close this
Control.
How is this done?

We have not been able to locate very much info about this Control.

Thanks for your help.
Brad