How to use multiple Application.run in c# program?

Question

C++ / C#

Classic form launch from the main function

static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());

        }

And here I run a hook to track mouse movement. Because of this, it gives an error

public static void start()
        {
            _hookID = SetHook(_proc);
           Application.Run();
            UnhookWindowsHookEx(_hookID);
        }

Answer 1

No way. You can't run it twice in one thread. All UI forms run on the same thread.
Why don't you want to track mouse movement with standard windowsforms messages?
If you really want to run SetHook, then run it before Application.Run in main, and do tracking control inside this hook by the value of the boolean flag, which you will already change in start ().