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* gotc.bat    : batch file for use TC 2.0
* gomsc.bat   : batch file for use MSC 5.0/6.0 
* demo31.prj  : project file for TC++3.0 or BC++ 3.1
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1. the 7188 connect to a touch screen HITECH, PWS-1700
2. the 7188 is master, PWS-1700 is slave
3. the 7188 send out request first, then 7188 receive the response
4. the sub-dir <pws1700> store the configuration code of PWS-1700