This contains the data within the uploaded file. The
representation of the file is a Variant containing a SafeArray of
Bytes. This binary format is frequently required when inserting a
BLOB into a database.
For most uploads the Data property will be identical to the
RawData property. However if files have been uploaded from
MacBinary capable Macintosh browsers (Internet Explorer but not
Netscape Navigator) this property will contain only the uploaded
data fork of the file.
The lower bound of this array is always zero and the upper bound
is equal to the size of the data minus one. If no data has been
uploaded the upper bound will be minus one.