hello the winform project(java swing or c#) require that the ONE computer connect to TWO screens,the screen1 is the operation form screen,the screen2 run a map winform app,the two screen are SYNCHRONIZED.that means if you input the query condition in the screen1 and click query button,the screen2 should highlight the location in the map,if you move the mouse to the screen2 and click somewhere,the detailed info should be displayed in the screen1. who can give me a big look about how to program such multi screen win form application?are they TWO application?how can i run them in the different screen that are connected to the SAME computer?how the two application run on different screen communicate with each other? thank you!!

You're letting the two screens confuse you. They have no impact on the problem at all. It's the same thing as having two windows on the same screen, as far as the program is concerned.

Most likely, it's just one program that creates two separate windows. When you do something in either window, it changes some data within the program, then both windows are updated to reflect the current data.