Doyle, check if the Offline property helps you here.
? ox.Offline
From MSDN
Offline Property
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Sets or retrieves a Boolean value that indicates whether the object is currently operating in offline mode.
Syntax
object.Offline(bOffline) [ = value ]
Possible Values
value Boolean that specifies or receives one of the following values:true The WebBrowser control is offline.
false Default. The WebBrowser control is not offline.
The property is read/write. The property has a default value of false.
Remarks
In offline mode, the browser is forced to read HTML pages from the local cache rather than from the source document.
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