unit Unit1; 

{ This unit shows how you can establish a connection to the internet without any 
  user interaction.} 


interface 

uses 
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, 
  Dialogs, StdCtrls; 

type 
  TForm1 = class(TForm) 
    Button1: TButton; 
    Button2: TButton; 
    edtEntry: TEdit;  // holds the name of the connection, e.g. 'bluewin' 
    edtUser: TEdit;   // the username for the above connection 
    edtPass: TEdit;   // and the password 
    procedure Button1Click(Sender: TObject); 
    procedure Button2Click(Sender: TObject); 
  private 
    { Private declarations } 
  public 
    { Public declarations } 
  end; 

var 
  Form1: TForm1; 

implementation 

uses shellapi; 
{$R *.dfm} 

procedure TForm1.Button1Click(Sender: TObject); 
var  
  cmd, par, fil, dir: PChar; 
begin 
  // establish the connection 
  // die Verbindung aufbauen 
  // rasdial.exe entryname username password 
  cmd := 'open'; 
  fil := 'rasdial.exe'; 
  par := PChar(edtEntry.Text + ' ' + edtUser.Text + ' ' + edtPass.Text); 
  dir := 'C:'; 
  // call rasdial.exe with Shellexecute 
  // rasdial mit Shellexecute aufrufen 
  ShellExecute(Self.Handle, cmd, fil, par, dir, SW_SHOWMINNOACTIVE); 
end; 


procedure TForm1.Button2Click(Sender: TObject); 
var  
  cmd, par, fil, dir: PChar; 
begin 
  // disconnect the connection to the Internet 
  // Verbindung zum Internet abbrechen 
  cmd := 'open'; 
  fil := 'rasdial.exe'; 
  par := PChar(edtEntry.Text + ' /DISCONNECT'); 
  dir := 'C:'; 
  ShellExecute(Self.Handle, cmd, fil, par, dir, SW_SHOWMINNOACTIVE); 
end; 
end.