C# Directx overlay problems

using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;
using System;
using System.ComponentModel;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Threading;
using System.Windows.Forms;
namespace Dxovlay
{
    public partial class Form1 : Form
    {
        internal struct Margins
        {
            public int Left;

            public int Right;

            public int Top;

            public int Bottom;
        }
        public struct RECT
        {
            public int left;

            public int top;

            public int right;

            public int bottom;
        }
        public const string WINDOW_NAME = "Call of Duty®: BlackOps";//Call of Duty®: BlackOps
        public const int GWL_EXSTYLE = -20;
        public const int WS_EX_LAYERED = 524288;
        public const int WS_EX_TRANSPARENT = 32;
        public const int LWA_ALPHA = 2;
        public const int LWA_COLORKEY = 1;
        private Device device;
        private static Microsoft.DirectX.Direct3D.Font font;
        private static Microsoft.DirectX.Direct3D.Font fontSmall;

        [DllImport("user32.dll")]
        private static extern IntPtr GetForegroundWindow();

        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        public static extern bool GetWindowRect(IntPtr hwnd, out RECT lpRect);

        [DllImport("user32.dll", SetLastError = true)]
        private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("user32.dll", SetLastError = true)]
        private static extern uint GetWindowLong(IntPtr hWnd, int nIndex);

        [DllImport("user32.dll")]
        private static extern int SetWindowLong(IntPtr hWnd, int nIndex, IntPtr dwNewLong);

        [DllImport("user32.dll")]
        private static extern bool SetLayeredWindowAttributes(IntPtr hwnd, uint crKey, byte bAlpha, uint dwFlags);

        [DllImport("dwmapi.dll")]
        private static extern void DwmExtendFrameIntoClientArea(IntPtr hWnd, ref Margins pMargins);

        public static RECT GetWindowRect(IntPtr hWnd)
        {
            RECT result = default(RECT);
            GetWindowRect(hWnd, out result);
            return result;
        }
        public IntPtr handle = FindWindow(null, "Call of Duty®: BlackOps");
        public IntPtr selectedWindow;
        private static Line line;
        private static Line lineAA;
        private Margins marg;
        private void Overlay_Paint(object sender, PaintEventArgs e)
        {
            this.marg.Left = 0;
            this.marg.Top = 0;
            this.marg.Right = base.Width;
            this.marg.Bottom = base.Height;
            DwmExtendFrameIntoClientArea(base.Handle, ref this.marg);
        }
        private void Overlay_Load(object sender, EventArgs e)
        {
            base.Top = rect.top;
            base.Left = rect.left;
            this.timer1.Start();
        }
        private void timer1_Tick(object sender, EventArgs e)
        {
            base.Top = rect.top;
            base.Left = rect.left;
        }
        public Form1()
        {
            InitializeComponent();
           
           RECT  rect = GetWindowRect(handle);
           selectedWindow = FindWindow(null, "Call of Duty®: BlackOps");
           this.marg.Left = 0;
           this.marg.Top = 0;
           this.marg.Right = 0;
           this.marg.Bottom = 0;
           DwmExtendFrameIntoClientArea(handle, ref marg);
           Paint += new PaintEventHandler(this.Overlay_Paint);
           base.Size = new Size(rect.right - rect.left, rect.bottom - rect.top);
           SetWindowLong(Handle, -20, (IntPtr)((long)((ulong)(GetWindowLong(base.Handle, -20)))));
           SetLayeredWindowAttributes(base.Handle, 0, 255, 2);
           this.components = new Container();
           this.timer1 = new System.Windows.Forms.Timer(this.components);
           base.SuspendLayout();
           this.timer1.Interval = 86;
           this.timer1.Tick += new EventHandler(this.timer1_Tick);
           base.AutoScaleDimensions = new SizeF(6f, 13f);
           base.AutoScaleMode = AutoScaleMode.Font;
           FormBorderStyle = FormBorderStyle.Fixed3D;
            this.BackColor = Color.Black;
            base.ClientSize = new Size(284, 262);
            base.FormBorderStyle = FormBorderStyle.None;
            base.Name = "Overlay";
            base.ShowIcon = false;
            base.ShowInTaskbar = false;
            this.Text = "Overlay";
            base.TopMost = true;
            base.TransparencyKey = Color.Black;
            base.Load += new EventHandler(this.Overlay_Load);
            base.Paint += new PaintEventHandler(this.Overlay_Paint);
            base.ResumeLayout(false);
            PresentParameters presentParameters = new PresentParameters();
            presentParameters.Windowed = true;
            presentParameters.SwapEffect = SwapEffect.Discard;
            presentParameters.BackBufferFormat = Format.A8R8G8B8;
            this.device = new Device(0, DeviceType.Hardware, base.Handle, CreateFlags.HardwareVertexProcessing, new PresentParameters[]
			{
				presentParameters
			});
            font = new Microsoft.DirectX.Direct3D.Font(this.device, new System.Drawing.Font("Microsoft Sans Serif", 12f, FontStyle.Bold));
            fontSmall = new Microsoft.DirectX.Direct3D.Font(this.device, new System.Drawing.Font("Segoe UI", 15f, FontStyle.Bold));
           line = new Line(this.device);
            line.Antialias = false;
            lineAA = new Line(this.device);
            lineAA.Antialias = true;
            new Thread(new ThreadStart(this.dxThread))
            {
                IsBackground = true
            }.Start();
        }
        public static bool isRunning = true;
        public RECT rect;
        public static void DrawShadowText(string text, Point position, Color color, Color colorShadow)
        {
            fontSmall.DrawText((Sprite)null, text, new Point(position.X - 2, position.Y - 2), colorShadow);
            fontSmall.DrawText((Sprite)null, text, position, color);
        }
        private void dxThread()
        {
            while (isRunning)
            {
               
                this.device.Clear(ClearFlags.Target, Color.FromArgb(0, 0, 0, 0), 1.0f, 0);
                this.device.RenderState.ZBufferEnable = false;
                this.device.RenderState.Lighting = false;
                this.device.RenderState.CullMode = Cull.None;
                this.device.Transform.Projection = Matrix.OrthoOffCenterLH(0.0f, (float)this.Width, (float)this.Height, 0.0f, 0.0f, 1f);
                this.device.BeginScene();
                GetWindowRect(this.handle, out rect);
                this.selectedWindow = FindWindow((string)null, "Call of Duty®: BlackOps");//Call of Duty®: BlackOps
             

                    DrawShadowText("Fine workng DXD9", new Point(10, 30), Color.Green, Color.Black);
                    DrawShadowText("SOME TEXT", new Point(900, 950), Color.Blue, Color.Blue);
                    //if (Engine.globalStuffs.bEspMaster)
                    //{
                    //    this.DrawEsp();
                    Thread.Sleep(10);
                  
                    //}
                
                this.device.EndScene();
                this.device.Present();
            }
            this.device.Dispose();
            Application.Exit();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            
        }

        private void checkBox1_CheckedChanged(object sender, EventArgs e)
        {

        }
    }
}