http://www.codeguru.com/vb/gen/vb_system/keyboard/article.php/c4829 Managing Low-Level Keyboard Hooks with the Windows API
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q226359 HOWTO: Disable Task Switching on Win32 Platforms
http://www.vbaspnew.com/ziyuan/w/kz/42.txt
google SetWindowsHookEx
google disable alt.tab

http://www.hosp.ncku.edu.tw/~cww/html/q00016.html callback 哭爸 function SetWindowsHookEx