Basic Encryption Hashes, namely MD5

i would like to be able to encrypt strings into 32byte MD5 hashes.

is there a simple way to do this?

also what other standards are there for md5 eg. 16byte, 64 and what is the best to use?

Check this link
http://www.visualbasicforum.com/showthread.php?threadid=103959

thanx, sorry for duping, i tried to search but MD5 is too short (min. 4 chars)