Клик мышкой вне формы приложения

public partial class Form1 : Form
    {
        private IKeyboardMouseEvents m_Events;
        
        [System.Runtime.InteropServices.DllImport("user32.dll")]
        public static extern void mouse_event(int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo);
 
        public const int MOUSEEVENTF_LEFTDOWN = 0x02;
        public const int MOUSEEVENTF_LEFTUP = 0x04;
        public const int MOUSEEVENTF_RIGHTDOWN = 0x08;
        public const int MOUSEEVENTF_RIGHTUP = 0x10;
 
        public Form1()
        {
            InitializeComponent();
        }
 
        private void HookManager_MouseMove(object sender, MouseEventArgs e)
        {
            labelMousePosition.Text = string.Format("x={0:0000}; y={1:0000}", e.X, e.Y);
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
            SubscribeGlobal();
        }
 
        private void SubscribeGlobal()
        {
          Subscribe(Hook.GlobalEvents());
        }
 
        private void Subscribe(IKeyboardMouseEvents events)
        {
            m_Events = events;
            m_Events.MouseMove += HookManager_MouseMove;
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            int x = -1252;
            int y = -0111;
 
            mouse_event(MOUSEEVENTF_LEFTDOWN, x, y, 0, 0);
            mouse_event(MOUSEEVENTF_LEFTUP, x, y, 0, 0);
        }
    }

        public static void LeftClick(int x, int y)
        {
            Cursor.Position = new System.Drawing.Point(x, y);
            mouse_event((int)(MOUSEEVENTF_LEFTDOWN), 0, 0, 0, 0);
            mouse_event((int)(MOUSEEVENTF_LEFTUP), 0, 0, 0, 0);
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
 
            LeftClick(-1252, -0110);
        }