To run Mainframe Subsystem applications in a TN3270 mainframe display: 
               	 
            
 
            	 
             
               		
               - Build your Mainframe Subsystem Application project. 
                  		
               
- Ensure that your project is associated with an enterprise server and that the server is running. 
                  		
               
- Launch the TN3270 Mainframe Display and connect it to the server. 
                  		
               
- Use the TN3270 Mainframe Display to execute the application.