This section walks you through the process of creating a REST type service interface for the BookDemo application using the
               source program 
               		book.cbl. 
               	 
            
 
            	 
             
               		
               - From the Solution Explorer, right-click the 
                  		  ProgramCORS project; then click 
                  		  Add > New Item. 
                  		
               
- Expand 
                  		  COBOL; then select 
                  		  Native. 
                  		
               
- In the center pane, click 
                  		  Service Interface. 
                  		
               
- In the 
                  		  Name field, type 
                  		  ProgramCORS; then click 
                  		  Add.
                  		
               
- In the 
                  		  Type of interface field, select 
                  		  Web Service. 
                  		
               
- Click the 
                  		  JSON transport type. 
                  		
               
- In the 
                  		  Type of source field, select 
                  		  COBOL Program; then click 
                  		  OK. 
                  		
               
At this point, Visual Studio adds the 
               		ProgramCORS service interface to the Solution Explorer and invokes the Interface Mapper. You are now ready to define the details of the
               service interface.