How can I create a thumbnail of a bitmap?

You can use the GetThumbnailImage method to generate and display a thumbnail of a bitmap as shown below:

[C#]

public bool ThumbnailCallback()
{
	return false;
}

//Generate a thumbnail of the bitmap and display it in a PictureBox

Image.GetThumbnailImageAbort myCallback =
new Image.GetThumbnailImageAbort(ThumbnailCallback);
Bitmap myBitmap = new Bitmap('C:\\images\\MyBitMap.bmp');
this.pictureBox1.Image = (Bitmap) myBitmap.GetThumbnailImage(150,75,myCallback, IntPtr.Zero);