Checks for the existence of the specified
               	 program. 
               
            
            	 
            
               		
               Note: This function is not supported in JVM COBOL.
                  		
               
               	 
              
            	 
            
               Syntax:
 
               		 
               		call x"91" using result
                 function-code
                 parameter 
               	   
            	 
            
               Parameters:
 
               		 
               		
                
                  		   
                  			 
                  -  
                     				result 
                     			 
                  
- Using call prototype (see Library Routines - Key) : cblt-x1-compx
                     				
                     			 
                  
- Picture: pic x comp-x. 
                     			 
                  
-  
                     				function-code 
                     			 
                  
- Using call prototype (see Library Routines - Key) : cblt-x1-compx
                     				
                     			 
                  
- Picture: pic x comp-x. 
                     			 
                  
-  
                     				parameter 
                     			 
                  
- Group containing: 
                     				name-len   cblt-x1-compx   *> pic x comp-x
progname   pic x(n)        *> pic x(n) 
  
            	 
            
               On Entry:
 
               		 
               		
                
                  		
                  
                      
                        			  
                        			  
                        			 
                         
                           				
                            
                              				  
                              | function-code | Value 15 | 
 
                           				
                            
                              				  
                              | name-len | The length of the name
                                 					 in filename. | 
 
                           				
                            
                              				  
                              | progname | The name of the program
                                 					 to be looked for. This parameter must be at least 65 characters long. | 
 
                           			 
                         
                        		  
                     
                    
                  		
                 
               	 
              
            	 
            
               On Exit:
 
               		 
               		
                
                  		
                  
                      
                        			  
                        			  
                        			 
                         
                           				
                            
                              				  
                              | progname | If the program is found,
                                 					 contains the full name. | 
 
                           				
                            
                              				  
                              | result | Set to zero if the
                                 					 program was found, non-zero otherwise. | 
 
                           			 
                         
                        		  
                     
                    
                  		
                 
               	 
              
            	 
             
            
           
         
         
Comments:
If the program file is found, you must then call the program using the filename returned.
This call must not be used to check for the existence of data files; use CBL_CHECK_FILE_EXIST instead.