Description
DLL函数说明1、打开串口Function ComOpen(nport:longint;User:Pchar):longint;stdcall;参数：nport:打开串口号，取值为1～8，代表COM1～COM8;User:DLL授权用户名;返回值：长整型，操作成功返回1，否则返回0；打开串口不成功即返回0时的原因：1)、串口不存在或被占用;2)、DLL试用过期;3)、DLL授权注册不正确。
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