spcomm.pas

扫描枪通过串口读取条形码,减少手工输入错误

unit SPComm;
//
// This Communications Component is implemented using separate Read and Write
// threads. Messages from the threads are posted to the Comm control which is
// an invisible window. To handle data from the comm port, simply
// attach a handler to 'OnReceiveData'. There is no need to free the memory
// buffer passed to this handler. If TAPI is used to open the comm port, some
// changes to this component are needed ('StartComm' currently opens the comm
// port). The 'OnRequestHangup' event is included to assist this.
//
// David Wann
// Stamina Software
// 28/02/96
// [e-mail]
//
//
// This component is totally free(copyleft), you can do anything in any
// purpose EXCEPT SELL IT ALONE.
//
//
// Author