Decrypting mcrypted strings on Windows desktop

Hi folks, Bit OT but I am hoping someone on the list can help. I need to encrypt short strings in PHP, using mcrypt by preference, email it to the customer, and have him decrypt the string on the Windoze desktop. But all the Windows encryption utilities I can find use proprietary file formats - none can decrypt the string output by mcrypt. Can anyone help me out here - I am running out of time. Either an open source or a commercial solution would be fine. -- Geoff Caplan Advantae Ltd mailto:geoff@advantae.com http://www.advantae.com