External Cross-Hair (C# Code)

using System.Runtime.InteropServices;

[DllImport("user32.dll", EntryPoint = "FindWindow")]
        public static extern IntPtr FindWindow(string lp1, string lp2);

IntPtr Handle = FindWindow(null, "WhatYouWant");
            try
            {
                
                using (Graphics g = Graphics.FromHwnd(Handle))
                {
                    Pen PN = new Pen(Brushes.Khaki, 2);
                    g.DrawLine(PN, 961, 520, 961, 560);
                    g.DrawLine(PN, 985, 540, 935, 540);
                    g.Dispose();
                }
            }
            catch (Exception Ex)
            {
                MessageBox.Show(Ex.Message, "Error Message:", MessageBoxButtons.OK, MessageBoxIcon.Error);
                MessageBox.Show("If you could be so nice to report this on the released site, it would be great.", "Ops:", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                Application.Exit();
            }