key generator for encryption

What I need is a simple function completed where it returns just a combination of letters and numbers. The parameter would be the length of the string it should come up with. The combination needs to contain letters (upper and lower case) and numbers. The purpose of this is to generate a key to use for encryption. Should mostly use a random function. This will run one time only. Let me know if you have any questions. ## Deliverables The source code only for the function to create a key to use to create passwords and encryption keys. Should be in the format of this public function keygenerator(stringlength as integer) as string keygenerator=result end function ## Platform Windows 2000 Server Edition, Windows XP Home Edition.