http://msdn.microsoft.com/msdnmag/issues/02/07/CQA/ Get the Main Window, Get EXE Name Process WM_ACTIVATEAPP
http://www.vb-helper.com/index_api.html 許多 win32 api 小技巧
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/windows.asp window 相關 function / concepts
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwui/html/msdn_hooks32.asp hook event mouse keyboard