问题描述 麻烦大家帮我详细解释下下面这段与串口交互的代码,谢谢! void __fastcall TfrmPatient::edtDosageDblClick(TObject *Sender) { //read comm data,then set in edtDosage edit //open com port HANDLE hCom = CreateFile(g_ConfigManager.sComPort.c_str(),GENERIC_WRITE,0,NULL,OPEN_EXISTIN