Managed DirectX Problem, Please Help!

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;

namespace DirectX1
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class DirectXForm : System.Windows.Forms.Form
	{
		/// <summary>
		/// Required designer variable.
		/// </summary>
		
		private Device device;
		private System.ComponentModel.Container components = null;

		public DirectXForm()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			this.SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.Opaque, true);
		}

		/// <summary>
		/// Initialize the DirectX Device
		/// </summary>
		public void InitializeDevice()
		{
			PresentParameters presentParams = new PresentParameters();

			presentParams.Windowed = true;
			presentParams.SwapEffect = SwapEffect.Discard;

			device = new Device(0, DeviceType.Hardware, this, CreateFlags.SoftwareVertexProcessing, presentParams);
		}


		protected override void OnPaint(PaintEventArgs e)
		{
			
			// Set the Camera
			device.Transform.Projection = Matrix.PerspectiveFovLH((float)Math.PI / 4, this.Width / this.Height, 1.0f, 100.0f);
			device.Transform.View = Matrix.LookAtLH(new Vector3(0.0f, 0.0f, 5.0f), new Vector3(), new Vector3(0.0f, 1.0f, 0.0f));

			device.RenderState.Lighting = false;
			device.RenderState.CullMode = Cull.None;

            // Clear the Scene
			device.Clear(ClearFlags.Target, Color.CornflowerBlue, 1.0f, 0);

			// Vertex Buffer
			CustomVertex.PositionColored[] verts= new CustomVertex.PositionColored[3];
						
			verts[0].Position = new Vector3(0f, 1f, 1f);
			verts[0].Color = Color.Red.ToArgb();
			
			verts[1].Position = new Vector3(-1f, -1f, 1f);
			verts[1].Color = Color.Green.ToArgb();

			verts[2].Position = new Vector3(1f, -1f, 1f);
			verts[2].Color = Color.Yellow.ToArgb();
				
			
			// Draw the scene
			device.BeginScene();
			device.VertexFormat = CustomVertex.PositionColored.Format;
			device.DrawUserPrimitives(PrimitiveType.TriangleList, 1, verts);
			device.EndScene();

			device.Present();

			//base.OnPaint (e);

			this.Invalidate();
		}


		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			// 
			// DirectXForm
			// 
			this.components = new Container();
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(500, 500);
			this.Text = "DirectXForm";

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			using(DirectXForm dxf = new DirectXForm())
			{
				dxf.Show();
				dxf.InitializeDevice();
				Application.Run(dxf);
			}
		}
	}
}