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如何用Delphi实现局域网内消息传递

本程序介绍如何在局域网内安装了信使服务的Windows 2000计算机之间传递消息。

向窗体上添加两个TLabel组件、两个TEdit组件和一个TButton组件

首先声明NetMessageBufferSend函数,该函数在netapi32.dll库中:

 

type
             NET_API_STATUS = LongInt;
             function NetMessageBufferSend(servername: LPCWSTR; msgname: LPCWSTR;
             fromname: LPCWSTR; buf: Pointer;
             buflen: DWORD): NET_API_STATUS;
             stdcall;external ’netapi32.dll’;

在程序运行过程中,单击Send按钮,就会向Computer文本框指定的计算机发送Content文本框中输入的消息,响应代码如下:

 

procedure TForm1.Button1Click(Sender: TObject);
            var
             WideMsg:PWideChar;
             DestName:PWideChar;
            begin
             DestName:=PWideChar(WideString(Edit1.Text));
             WideMsg:=PWideChar(WideString(Edit2.Text));
             NetMessageBufferSend(nil,DestName,nil,WideMsg,Length(Edit2.Text)*2);
            end;

程序代码如下:

 

unit Unit1;
            inte易做图ce
            uses
            Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
            Dialogs, StdCtrls;
            type
             NET_API_STATUS = LongInt;
             function NetMessageBufferSend(servername: LPCWSTR; msgname: LPCWSTR;
             fromname: LPCWSTR; buf: Pointer;
             buflen: DWORD): NET_API_STATUS;
             stdcall;external ’netapi32.dll’;
            type
             TForm1 = class(TForm)
             Edit1: TEdit;
             Label1: TLabel;
             Label2: TLabel;
             Edit2: TEdit;
             Button1: TButton;
             procedure Button1Click(Sender: TObject);
            private
             { Private declarations }
            public
             { Public declarations }
            end;
            var
             Form1: TForm1;
             implementation
             {$R *.dfm}
             procedure TForm1.Button1Click(Sender: TObject);
            var
             WideMsg:PWideChar;
             DestName:PWideChar;
            begin
             DestName:=PWideChar(WideString(Edit1.Text));
             WideMsg:=PWideChar(WideString(Edit2.Text));
             NetMessageBufferSend(nil,DestName,nil,WideMsg,Length(Edit2.Text)*2);
            end;
            end.

保存文件,然后按F9键运行程序,在Computer对应的文本框中输入目的计算机名,在Content对应的文本框中输入消息内容。

单击Send按钮,就会向指定的计算机发送消息,在接收消息的计算机上就会显示一个对话框。

补充:软件开发 , Delphi ,
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