The GASK('OPENGRAPH',
                  . . . ) routine returns the name of the graph that is currently open.
               
 
               The name returned is
                  one of the following:   
                  
                  
                     
                        - 
                           
the name specified in the GRAPH('CLEAR',
                                 . . . ) function
                              
 
                            
                         
                        - 
                           
if the name is omitted from the
                                 GRAPH('CLEAR', . . . ) function, some form of DSGI: for example, DSGI,
                                 DSGI1, and DSGI2