WEB Authentication

Hi !
I need to make a program where the user will enter the userid and the paassword and the program will Log in to a specific web site.
For Exemple, To access the internet I have to open my IE, type "http://www.veloxzone.com.br/vfile/pages/serviceLogon.jsp?service=internet_TERRA3"
and then manually enter my userid and password.
I want to make a program to do it automatically but I don't know wich component I can use and how to send this information to the web site. the address authetication is:
http://www.veloxzone.com.br/dashboard?fcn=serviceLogon&service=internet_TERRA3&username=XXXXXXXXpassword=XXXXXXX

Any help would be appreciated.
Rodrigo Lira.
PS: Sorry about my english.
lirageneveAsked:
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Eddie ShipmanAll-around developerCommented:
Try this:
function TForm1.SendPostData(URL, AField1, AField2, AField3, AField4: String): TMemoryStream;
var
 Params: TStringStream;
begin
 Result := TMemoryStream.create;
 Params := TStringStream.create('');

 try
   with IdHTTP1 do
   begin
     Params.WriteString(URLEncode(AField1 + '&'));
     Params.WriteString(URLEncode(AField2));
     Params.WriteString(URLEncode(AField3));
     Params.WriteString(URLEncode(AField4));
     Request.ContentType := 'application/x-www-form-urlencoded';
     try
       Post(URL, Params, Result);
     except
       on E: Exception do
         showmessage('Error encountered during POST: ' + E.Message);
     end;
   end;
 Result.WriteBuffer(#0' ', 1);
 Result.Position := 0;
 except
   Params.Free;
 end;
end;

Usage:
SendPostData('http://www.veloxzone.com.br/dashboard',
             'fcn=serviceLogon',
             'service=internet_TERRA3',
             'username=XXXXXXXX',
             'password=XXXXXXX');

The result of calling the function can be saved, too:
procedure TForm1.btnLoginClick(Sender: TObject);
var
  HTMLStream: TMemoryStream;
begin
  HTMLStream := SendPostData('http://www.veloxzone.com.br/dashboard',
                             'fcn=serviceLogon',
                             'service=internet_TERRA3',
                             'username=XXXXXXXX',
                             'password=XXXXXXX');
  // Now save the result so we may open it in the browser or do ????
  HTMLStream.SaveToFile('c:\mysearch.htm');
  HTMLStream.Free;
end;
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lirageneveAuthor Commented:
I think the code is ok, but I still dont know wich component I can use...
0
Eddie ShipmanAll-around developerCommented:
Indy's  IdHTTP is the component. Included with Delphi6 and above, downloadable from
http://www.nevrona.com/indy for any other version.
0
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