摘要：不多说先来段代码（重叠方式） if(hCom != NULL) { CloseHandle(hCom); } hCom=CreateFile(_T("COM1:"), GENERIC_READ|GENERIC_WRITE, 0,NULL , OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL); if (hCom==INVALID_HANDLE_VALUE) { AfxMessageBox(_T("打开COM失败!")); return ... 阅读全文