如何用Delphi实现局域网内消息传递
点击次数：57 次 发布日期：2008-11-09 08:45:55 作者：源代码网
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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。 软件开发网 www.mscto.com
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’;
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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;
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程序代码如下：
unit Unit1;
interface
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.
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