msnspy,可以后台捕获MSN用户名密码的程序，采用钩子实现，中文注释很详细，适合看源码研究。-msnspy, background capture MSN users Password procedures used to achieve the hook, Chinese translations very detailed look at the source code for research.

通过钩子捕捉MSN的密码。通过Findwindow找到MSN的窗体，然后通过FindWindowEX找到自窗体的输入框接着捕捉按键。-Through the hook to capture MSN password. FindWindow found through the MSN form, and then through the FindWindowEx to find form since the input box and then capture button.