我毕设要用delphi编一个串口通信的程序，我看了好些书，编了一个，可结果出不来，我用的是mscomm控件，只要能实现简单的收发数即可。 我把我的源码法上来，希望各位高手指点一二，小妹我感激不尽！！！ interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, OleCtrls, MSCommLib_TLB; type TForm1 = class(TForm) Label1: TLabel; Edit1: TEdit; Label2: TLabel; Edit2: TEdit; Button1: TButton; Memo1: TMemo; Memo2: TMemo; Label3: TLabel; Label4: TLabel; Button2: TButton; Button3: TButton; MSComm1: TMSComm; procedure FormCreate(Sender: TObject); procedure Button2Click(Sender: TObject); procedure Button3Click(Sender: TObject); procedure Button1Click(Sender: TObject); procedure MSComm1Comm(Sender: TObject); private { Private declarations } public { Public declarations } end; var Form1: TForm1; implementation {$R *.dfm} procedure TForm1.FormCreate(Sender: TObject); begin mscomm1.commport:=2; mscomm1.settings:='9600,n,8,1'; mscomm1.inputlen:=0; mscomm1.inbuffercount:=0; mscomm1.portopen:=true; mscomm1.rthreshold:=1; mscomm1.sthreshold:=1; mscomm1.InBufferSize :=1024; mscomm1.OutBufferSize :=1024; end; procedure TForm1.Button2Click(Sender: TObject); begin mscomm1.rtsenable:=true; end; procedure TForm1.Button3Click(Sender: TObject); begin mscomm1.dtrenable:=true; end; procedure TForm1.Button1Click(Sender: TObject); begin mscomm1.portopen:=false; mscomm1.dtrenable:=false; mscomm1.rtsenable:=false; close; end; procedure TForm1.MSComm1Comm(Sender: TObject); var re:olevariant; se:olevariant; begin case mscomm1.CommEvent of comevsend: begin se:=mscomm1.Input ; se:=memo1.Text +se; end; comevreceive: begin re:=mscomm1.Output ; memo2.Text :=memo2.Text +re; end; end; end; end. 这个程序收数部分我试了不灵，发数的没试，估计也不灵，希望大家多多指点，拜托了！！！ 也可以把源码发到我的邮箱中：woaixgll@sina.com.cn 再次万分感谢！！！