This method is called internally by the parent form of the control when the form starts.
HRESULT Start( void );
NOERROR indicates success. If an error occurs, the appropriate HRESULT value is returned.
An application should not directly call this method. After a form initializes a control by calling IASControl::Init, it invokes this method internally to start processing. A control should not start processing until this method has been invoked. A form notifies a control to stop processing with a call to IASControl::Close. If a message sink exists, the control forwards the message to its IASClassMsgSink::Start method.
IASControl::Init, IASControl::Close, IASClassMsgSink::HandleClose