All About Key Board Events

 Get Asynchronous State of Windows keys:
http://www.cplusplus.com/forum/windows/6632/

Get Async Key State
http://www.java2s.com/Code/CSharp/Event/GetAsyncKeyState.htm

WM_KEYUP message

http://msdn.microsoft.com/en-us/library/windows/desktop/ms646281%28v=vs.85%29.aspx

SendInput function

http://msdn.microsoft.com/en-us/library/windows/desktop/ms646310%28v=vs.85%29.aspx

Keyboard Input Model (Best One)

http://msdn.microsoft.com/en-us/library/windows/desktop/ms646267%28v=vs.85%29.aspx#_win32_Keyboard_Input_Model

GetAsyncKeyState function

http://msdn.microsoft.com/en-us/library/windows/desktop/ms646293%28v=vs.85%29.aspx

Hooks In Windows
http://msdn.microsoft.com/en-us/library/windows/desktop/ms632589%28v=vs.85%29.aspx

msdn.microsoft.com/en-us/library/windows/desktop/ms644959(v=vs.85).aspx

http://www.codeproject.com/Articles/8721/Thunking-MouseProc-in-IE-add-in