Call the OutputFile property to programmatically save the thumbnail picture as BMP or ICO. The OutputFile method fails if there is no thumbnail loaded. Use the InputFile property to specify a file whose thumbnail should be get. The .bmp suffix is appended to the output if the thumbnail is a bitmap, else .ico is added. Use the ThumbnailType property to retrieve the type of the thumbnail being retrieved. Use the Thumbnail property to access the thumbnail as a picture. The SaveAs method generates programmatically pictures from the current thumbnail, as BMP, JPG, GIF, PNG, TIFF format.