A Picture/Image object that shows the file's thumbnail view.
The Bitmap property always returns a BITMAP object that
shows the file's thumbnail. This property is similar with the Thumbnail
property excepts that the last it may returns an ICO, BITMAP, JPEG, TIFF
pictures.
Use the InputFile property to specify
the file whose thumbnail is retrieved. Use the ThumbnailType
property to specify whether the thumbnail is a bitmap or an icon. For
instance, if you set the ThumbnailType property on exThumbnailIcon, and calling the InputFile property, the control gets the icon
representation of the file. If the ThumbnailType property on
exThumbnailIcon is
exThumbnailBitmap the control tries to get a bitmap representation of the file
if it is available, else the Thumbnail property is nothing, and the
ThumbnailType property is exNoThumbnail. Use the
OutputFile property to save the
thumbnail picture.