System.NullReferenceException

[krito]

Hi I'm havind this problem: An unhandled exception of type 'System.NullReferenceException' occurred in system.windows.forms.dll

Additional information: Referencia a objeto no establecida como instancia de un objeto.

I know is a common error but I just don't know what to 2!!!

so If somebody could helpe that would be really great!!
this is the code:::::::


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 DirectX_Tutorial{

publicclass WinForm : System.Windows.Forms.Form{

private Device device;
private System.ComponentModel.Container components = null;
public WinForm()
{
InitializeComponent();
}
publicbool InitializeDevice()

{

try

{

PresentParameters presentParams = new PresentParameters();

presentParams.Windowed = true;

presentParams.SwapEffect = SwapEffect.Discard;

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

returntrue;

}

catch (DirectXException)

{

returnfalse;

}

}

protectedoverridevoid OnPaint(System.Windows.Forms.PaintEventArgs e)

{

device.Clear(ClearFlags.Target, Color.DarkSlateBlue , 1.0f, 0);

device.Present();

}

protectedoverridevoid Dispose (bool disposing)

{

if (disposing)

{

if (components != null)

{

components.Dispose();

}

}

base.Dispose(disposing);

}

privatevoid InitializeComponent()

{

this.components = new System.ComponentModel.Container();

this.Size = new System.Drawing.Size(500,500);

this.Text = "DirectX Tutotial";

}

staticvoid Main()

{

using (WinForm our_dx_form = new WinForm())

{

our_dx_form.InitializeDevice();

Application.Run(our_dx_form);

}

}

}

}