Hi,
The hardest part of this is to convert the hex string to an array of
bytes. Please refer Neilck's article on Code Project for a class to do
this:
http://www.codeproject.com/csharp/hexencoding.asp
once that's done, the rest is fairly simple:
byte[] byteArray = HexEncoding.GetBytes(hexString, out discarded);
MemoryStream stream = new MemoryStream( byteArray );
Bitmap bitmap = new Bitmap( stream );
Hope this works or at least that it helps ;)