Establishes
            a view for a specified viewport
         
         (setview view_descriptor [vport_id]) 
 
         Arguments
         
- view_descriptor
 
            - 
               
                  An entity definition
                     list similar to that returned by tblsearch when
                     applied to the VIEW symbol table.
                  
                
             - vport_id
 
            - 
               
                  An integer identifying
                     the viewport to receive the new view. If vport_id is
                     0, the current viewport receives the new view.
                  
                  You can obtain the vport_id number
                     from the CVPORT system variable.
                  
                
             
         
         Return Values
         
         If successful, the setview function returns
            the view_descriptor.