ICustomDoc Interface
The ICustomDoc interface is implemented by IE4/MSHTML to allow a host to set IE4/MSHTML's IDocHostUIHandler interface. Normally, IE4/MSHTML will call the host client site'sQueryInterface method to obtain the IDocHostUIHandler interface. IE4/MSHTML implements ICustomDoc so that a host that does not implement a client site can still use IE4/MSHTML's UI customization features.
ICustomDoc is derived fromIUnknown. The following is the ICustomDoc specific method: SetUIHandler
