'DeclarationPublic Function TwainUserClosedSource() As Boolean
public bool TwainUserClosedSource()
public function TwainUserClosedSource(): Boolean; 
            public function TwainUserClosedSource() : boolean;
            public: bool TwainUserClosedSource();
public: bool TwainUserClosedSource();
Return Value
            True if during the last acquisition process the user asked to close the device, else False.
            
