Load an image from stream.
The stream can contain any of the following types: JPEG, GIF,
TIFF, BMP, PNG, PSD, PDB, EXIF, WMF, EMF, EPS, PS or SWF
Ultimately each import goes through a ReadModule
so for details of the precise formats supported and the way they
are imported, see the ReadModule
Different images within the file can be accessed using the
Frame property. Different
portions of the image can be selected using the Selection property.