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’;
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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;
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.
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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 ,