Как узнать, что Соединение установлено?

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Oleg1 (2001-11-07 07:53) [4]

unit Unit1;

interface

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls;{ Flags for InternetGetConnectedState }
const
INTERNET_CONNECTION_MODEM = 1;
INTERNET_CONNECTION_LAN = 2;
INTERNET_CONNECTION_PROXY = 4;
INTERNET_CONNECTION_MODEM_BUSY = 8;
const
winetdll = "wininet.dll";
function InternetGetConnectedState(lpdwFlags: LPDWORD; dwReserved:DWORD):BOOL; stdcall; external winetdll name "InternetGetConnectedState";
type
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);

private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.DFM}

function InternetConnected: Boolean;
var
dwConnectionTypes: DWORD;
//Result: boolean;
begin
dwConnectionTypes := INTERNET_CONNECTION_MODEM+
INTERNET_CONNECTION_LAN+
INTERNET_CONNECTION_PROXY;
Result:= InternetGetConnectedState(@dwConnectionTypes, 0);

end;

procedure TForm1.Button1Click(Sender: TObject);
begin
if InternetConnected = true then showmessage("Есть соединение")else showmessage("Нет соединения");
end;

end.

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