CLASS PROJECT FORM TYPE "DemoEngine":
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;

namespace DemoEngine
{
    

    public partial class DEngine : Form
    {
        private Device myDevice;
        private PresentParameters presentParams;

        private bool isWindowed;
        public DEngine(int width, int height, bool windowed, string name)
        {
            InitializeComponent(); // This is already here for window creation 
            isWindowed = windowed;
            this.Name = name;
            this.Text = name;
            this.Size = new Size(width, height);
            this.ClientSize = this.Size;
            if (!windowed) this.FormBorderStyle = FormBorderStyle.None;
            // If fullscreen, remove window borders 
            // This will save us grief later // 
            this.SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.Opaque, true);
            this.Paint += new PaintEventHandler(Render);
        }
        private bool InitializeGraphics() // We specify bool so we can catch failures
        {
            try
            {
                // This first group of settings applies to both windowed and fullscreen modes 
                presentParams = new PresentParameters();
                presentParams.Windowed = isWindowed;
                presentParams.SwapEffect = SwapEffect.Discard;
                if (!isWindowed)
                {
                    presentParams.BackBufferFormat = Manager.Adapters[0].CurrentDisplayMode.Format;
                    presentParams.BackBufferCount = 1;
                    presentParams.BackBufferWidth = Manager.Adapters[0].CurrentDisplayMode.Width;
                    presentParams.BackBufferHeight = Manager.Adapters[0].CurrentDisplayMode.Height;
                    presentParams.FullScreenRefreshRateInHz = Manager.Adapters[0].CurrentDisplayMode.RefreshRate;
                    presentParams.PresentationInterval = PresentInterval.Immediate;
                }
                myDevice = new Device(0, DeviceType.Hardware, this, CreateFlags.SoftwareVertexProcessing, presentParams);
            }
            catch (DirectXException)
            {
                MessageBox.Show("Unable to initialize Direct3D"); return false;
            }

            return true;
        }
        // These parameters are required to use this as an addition to the Paint delegate of the Form 
        private void Render(object sender, PaintEventArgs e)
        {
            myDevice.Clear(ClearFlags.Target, Color.CornflowerBlue, 1.0f, 0);
            myDevice.Present();
            this.Invalidate(); // This will tell the window to redraw immediately when it finishes each frame 
        }
        public DEngine()
        {
            InitializeComponent();
        }
       
        
    }

}
WINDOWS APPLICATION  PROJECT CLASS TYPE "DEMO"
  static DEngine demo1 = new DEngine(800, 600, true, "Hazy Mind 3D Engine Demo Application");
        [STAThread]
        public static void Main()
        {
            demo1.Show();
            Application.Run(demo1);
        }