this.Tracer.Objects.Add(new WorldObject() {
	Surface = new Plane(Vector3.Down, 10.0d) {
		TextureXAxis = Vector3.Right,
		TextureYAxis = Vector3.Forward,
	},
	Material = new Material() {
		Colour = Colour.White,
		Texture = new ProceduralTexture(
			p => new Colour(
				1.0d,
				(Math.Sin(p.X) * Math.Cos(p.Y * 2)) / 2.0d + 0.5d,
				(Math.Cos(p.X) * Math.Sin(p.Y * 3)) / 2.0d + 0.5d,
				(Math.Sin(p.X * 5) * Math.Sin(p.Y / 0.3d)) / 2.0d + 0.5d
			)
		),
	},
});

[Type(BeeDevelopment.Sega8Bit.Hardware.VideoDisplayProcessor)]
VideoRam=Dump(Video\VideoRam.bin)
Address=49165
WaitingForSecond=False
AccessMode=ColourRamWrite
ReadBuffer=32
Registers=Dump(Video\Registers.bin)
System=Ntsc
SupportsMode4=True
; ... snip ...

#region Converting Keys into human-readable strings.

/// <summary>
/// Converts a <see cref="Keys"/> value into a human-readable string describing the key.
/// </summary>
/// <param name="key">The <see cref="Keys"/> to convert.</param>
/// <returns>A human-readable string describing the key.</returns>
public static string GetKeyName(Keys key) {

	// Convert the virtual key code into a scancode (as required by GetKeyNameText).
	int Scancode = MapVirtualKey((int)key, MapVirtualKeyMode.MAPVK_VK_TO_VSC);

	// If that returned 0 (failure) just use the value returned by Keys.ToString().
	if (Scancode == 0) return key.ToString();

	// Certain keys end up being mapped to the number pad by the above function,
	// as their virtual key can be generated by the number pad too.
	// If it's one of the known number-pad duplicates, set the extended bit:
	switch (key) {
		case Keys.Insert:
		case Keys.Delete:
		case Keys.Home:
		case Keys.End:
		case Keys.PageUp:
		case Keys.PageDown:
		case Keys.Left:
		case Keys.Right:
		case Keys.Up:
		case Keys.Down:
		case Keys.NumLock:
			Scancode |= 0x100;
			break;
	}

	// Perform the conversion:
	StringBuilder KeyName = new StringBuilder("".PadRight(32));
	if (GetKeyNameText((Scancode << 16), KeyName, KeyName.Length) != 0) {
		return KeyName.ToString();
	} else {
		return key.ToString();
	}
}

/// <summary>
/// Retrieves a string that represents the name of a key.
/// </summary>
/// <param name="lParam">Specifies the second parameter of the keyboard message (such as <c>WM_KEYDOWN</c>) to be processed.</param>
/// <param name="lpString">Pointer to a buffer that will receive the key name.</param>
/// <param name="size">Specifies the maximum length, in TCHAR, of the key name, including the terminating null character. (This parameter should be equal to the size of the buffer pointed to by the lpString parameter).</param>
/// <returns>The length of the returned string.</returns>
[DllImport("user32.dll")]
static extern int GetKeyNameText(int lParam, StringBuilder lpString, int size);

/// <summary>
/// Translates (maps) a virtual-key code into a scan code or character value, or translates a scan code into a virtual-key code.
/// </summary>
/// <param name="uCode">Specifies the virtual-key code or scan code for a key. How this value is interpreted depends on the value of the <paramref name="uMapType"/> parameter.</param>
/// <param name="uMapType">Specifies the translation to perform. The value of this parameter depends on the value of the <paramref name="uCode"/> parameter.</param>
/// <returns>Either a scan code, a virtual-key code, or a character value, depending on the value of <paramref="uCode"/> and <paramref="uMapType"/>. If there is no translation, the return value is zero.</returns>
[DllImport("user32.dll")]
static extern int MapVirtualKey(int uCode, MapVirtualKeyMode uMapType);

enum MapVirtualKeyMode {
	/// <summary>uCode is a virtual-key code and is translated into a scan code. If it is a virtual-key code that does not distinguish between left- and right-hand keys, the left-hand scan code is returned. If there is no translation, the function returns 0.</summary>
	MAPVK_VK_TO_VSC = 0,
	/// <summary>uCode is a scan code and is translated into a virtual-key code that does not distinguish between left- and right-hand keys. If there is no translation, the function returns 0.</summary>
	MAPVK_VSC_TO_VK = 1,
	/// <summary>uCode is a virtual-key code and is translated into an unshifted character value in the low-order word of the return value. Dead keys (diacritics) are indicated by setting the top bit of the return value. If there is no translation, the function returns 0.</summary>
	MAPVK_VK_TO_CHAR = 2,
	/// <summary>uCode is a scan code and is translated into a virtual-key code that distinguishes between left- and right-hand keys. If there is no translation, the function returns 0.</summary>
	MAPVK_VSC_TO_VK_EX = 3,
	MAPVK_VK_TO_VSC_EX = 4,
}

#endregion

using System;
using System.Runtime.InteropServices;
using System.Runtime.InteropServices.ComTypes;

namespace Thumbnailer {

	/// <summary>
	/// Defines the format of a bitmap returned by an <see cref="IThumbnailProvider"/>.
	/// </summary>
	public enum WTS_ALPHATYPE {
		/// <summary>
		/// The bitmap is an unknown format. The Shell tries nonetheless to detect whether the image has an alpha channel.
		/// </summary>
		WTSAT_UNKNOWN = 0,
		/// <summary>
		/// The bitmap is an RGB image without alpha. The alpha channel is invalid and the Shell ignores it.
		/// </summary>
		WTSAT_RGB = 1,
		/// <summary>
		/// The bitmap is an ARGB image with a valid alpha channel.
		/// </summary>
		WTSAT_ARGB = 2,
	}

	/// <summary>
	/// Exposes a method for getting a thumbnail image.
	/// </summary>
	[ComVisible(true), Guid("e357fccd-a995-4576-b01f-234630154e96"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
	public interface IThumbnailProvider {
		/// <summary>
		/// Retrieves a thumbnail image and alpha type. 
		/// </summary>
		/// <param name="cx">The maximum thumbnail size, in pixels. The Shell draws the returned bitmap at this size or smaller. The returned bitmap should fit into a square of width and height <paramref name="cx"/>, though it does not need to be a square image. The Shell scales the bitmap to render at lower sizes. For example, if the image has a 6:4 aspect ratio, then the returned bitmap should also have a 6:4 aspect ratio.</param>
		/// <param name="hBitmap">When this method returns, contains a pointer to the thumbnail image handle. The image must be a device-independent bitmap (DIB) section and 32 bits per pixel. The Shell scales down the bitmap if its width or height is larger than the size specified by cx. The Shell always respects the aspect ratio and never scales a bitmap larger than its original size.</param>
		/// <param name="bitmapType">Specifies the format of the output bitmap.</param>
		void GetThumbnail(int cx, out IntPtr hBitmap, out WTS_ALPHATYPE bitmapType);
	}

	/// <summary>
	/// Provides a method used to initialize a handler, such as a property handler, thumbnail provider, or preview handler, with a file stream.
	/// </summary>
	[ComVisible(true), Guid("b824b49d-22ac-4161-ac8a-9916e8fa3f7f"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
	public interface IInitializeWithStream {
		/// <summary>
		/// Initializes a handler with a file stream.
		/// </summary>
		/// <param name="stream">Pointer to an <see cref="IStream"/> interface that represents the file stream source.</param>
		/// <param name="grfMode">Indicates the access mode for <paramref name="stream"/>.</param>
		void Initialize(IStream stream, int grfMode);
	}

}

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.IO;
using System.Runtime.InteropServices;
using System.Runtime.InteropServices.ComTypes;

namespace Thumbnailer {
	
	[ComVisible(true), ClassInterface(ClassInterfaceType.None)]
	[ProgId("YourApp.ThumbnailProvider"), Guid("YOUR-GUID-IN-HERE")]
	public class ThumbnailProvider : IThumbnailProvider, IInitializeWithStream {

		#region IInitializeWithStream

		private IStream BaseStream { get; set; }

		public void Initialize(IStream stream, int grfMode) {
			this.BaseStream = stream;
		}

		#endregion
		
		#region IThumbnailProvider

		public void GetThumbnail(int cx, out IntPtr hBitmap, out WTS_ALPHATYPE bitmapType) {

			hBitmap = IntPtr.Zero;
			bitmapType = WTS_ALPHATYPE.WTSAT_UNKNOWN;
			
			try {
			
				// Thumbnailer code in here...
			
			} catch { } // A dirty cop-out.

		}
		
		#endregion
	}
}

using (var Thumbnail = new Bitmap(cx, cx)) {
	using (var G = Graphics.FromImage(Thumbnail)) {
		G.Clear(Color.Red);
	}
	hBitmap = Thumbnail.GetHbitmap();
}

private byte[] GetStreamContents() {

	if (this.BaseStream == null) return null;

	System.Runtime.InteropServices.ComTypes.STATSTG statData;
	this.BaseStream.Stat(out statData, 1);

	byte[] Result = new byte[statData.cbSize];

	IntPtr P = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(UInt64)));
	try {
		this.BaseStream.Read(Result, Result.Length, P);
	} finally {
		Marshal.FreeCoTaskMem(P);
	}
	return Result;
}