Clipz - A Friendly Introduction to the Windows 7 Taskbar Features

namespace Clipz
{
    using System.Drawing;
    using System.Windows.Forms;

    public class ImageClipboardItem : ClipboardItem
    {
        private Bitmap _previewImage;
        public Bitmap BitmapImage { get; set; }

        public override Bitmap Thumbnail
        {
            get
            {
                // The image only needs to be resized once.
                if(_previewImage == null)
                {
                    // Resize to 150x150 - the UI's preview picture box size
                    _previewImage = new Bitmap(BitmapImage, 150, 150);
                }

                return _previewImage;
            }
        }

        public override void Copy()
        {
            Clipboard.SetImage(BitmapImage);
        }
    }
}