挂接WH_CALLWNDPROC(WM_IME_COMPOSITION),WH_GETMESSAGE(WM_CHAR和WM_KEYUP),前者记录中文,后者记特殊按键和字母符号.-articulated WH_CALLWNDPROC (WM_IME_COMPOSITION) , WH_GETMESSAGE (WM_CHAR and WM_KEYUP), the former Chinese records, the latter in mind the special keys and alp

总线标准的最重要特点是公用性。具有相同总线的不同功能的模块都可以挂接到总线上，共享总线，扩充性能好 -fieldbus standard is the most important feature of the public nature. The same bus with the different functional modules that can be articulated bus, the bus, expansion of good performance