To add another program to the project: 
	 
 
	  
		- Right-click the project in Solution Explorer.
		
- Click 
		  Add > 
		  New Item. 
		
- Click 
		  PL/I Program in the installed templates. 
		
- Change the name to 
		  sub.pli and click 
		  Add. 
		  This adds the new file to the project, and opens it in the editor. 
		   
- Add the following line to the code: 
		  put skip list ('Hello world sub1' );