Call this function to set the external IDocHostUIHandlerDispatch interface for the CAxWindow object.
STDMETHOD( SetExternalUIHandler )(
   IDocHostUIHandlerDispatch* pDisp 
);
Parameters
- pDisp
[in] A pointer to an IDocHostUIHandlerDispatch interface. 
Return Value
A standard HRESULT value.
Remarks
This function is used by controls (such as the Web browser control) that query the host's site for the IDocHostUIHandlerDispatch interface.
Requirements
Header: atliface.h