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