什么是在delphi中引入解密和显示密码的最佳方法

A few weeks ago I lost my passwords for msn and more importent my company email, which change every 30 days or something, they are annoying because of there lengh and a I dont like writting them down. Anyhow I downloaded a so called password recovery tool and it worked well, but then spammed me for days with ads. My question is, how can I go about making a tool like this in delphi. There are soooo many programs that do this, well I want my own that I can trust. I have 8 msn accounts yes 8 and each one is for each company we deal with, its very confusing.. I need....A few weeks ago I lost my passwords for msn and