Как узнать в Интернете я или нет?

← →
andersen (2002-01-15 21:40) [0]

Как узнать в Интернете я или нет?
где то в FAQ узнал, что можно воспользоваться функцией из URL.DLL
Function InetIsOffline(Flag: Integer): Boolean; stdcall; external "URL.DLL"
У меня эта функция в любом случае выдает что я в и-нете.

← →
Dimaond Cat (2002-01-16 00:20) [1]

unit Unit1;

interface

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

type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
procedure Button2Click(Sender: TObject);
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

function InternetGetConnectedStateEx(lpdwFlags: LPDWORD;
lpszConnectionName: LPTSTR;
dwNameLen: DWORD;
dwReserved: DWORD): BOOL; stdcall;
function InternetGetConnectedStateEx; external "wininet.dll" name
"InternetGetConnectedStateEx";

implementation

{$R *.DFM}

Function GetVerOS: Integer;
Var
OSVer: OSVERSIONINFO;
begin
OSVer.dwOSVersionInfoSize := SizeOf(OSVERSIONINFO);
GetVersionEx(OSVer);
Result := OSVer.dwPlatformId;
end;

function InternetConnected: Boolean;
Const
INTERNET_CONNECTION_MODEM = 1; // local system uses a modem to connect to the Internet.
INTERNET_CONNECTION_LAN = 2; // local system uses a local area network to connect to the Internet.
INTERNET_CONNECTION_PROXY = 4; // local system uses a proxy server to сonnect to the Internet.
INTERNET_CONNECTION_MODEM_BUSY = 8; // local system"s modem is busy with a non-Internet connection.
Var
dwConnectionTypes : LongWord;
dwFlags: LongWord;
lpszConnectionName: PChar;
dwNameLen: DWORD;
dwReserved: DWORD;
begin
GetMem(lpszConnectionName,128);
StrCopy(lpszConnectionName,PChar("ГТС"));

dwNameLen := 120;
dwReserved := 0;
Result := False;
Case GetVerOS Of
VER_PLATFORM_WIN32s: // Win95
begin
dwConnectionTypes :=
INTERNET_CONNECTION_MODEM+INTERNET_CONNECTION_LAN+INTERNET_CONNECTION_PROXY;
Result := InternetGetConnectedState(@dwConnectionTypes,0);
end;
VER_PLATFORM_WIN32_WINDOWS: // Win98 OSR1
begin
dwFlags := 0;
Result :=
InternetGetConnectedStateEx(@dwFlags,lpszConnectionName,dwNameLen,dwReserved
);
If (dwFlags And INTERNET_CONNECTION_MODEM) = 0 Then
Result := False;
end;
VER_PLATFORM_WIN32_NT: // WinNT
begin

end;
end;
FreeMem(lpszConnectionName);
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
Close;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
If InternetConnected Then
Button1.Caption := "Connected";
end;

end.

← →
MARcoDEN (2002-01-20 09:59) [2]

uses psock, wininet
....
procedure TForm1.TimerTimer(Sender: TObject);
var
IsConnect: Boolean;
Flags: DWORD;
begin
IsConnect := InternetGetConnectedState(@Flags, 0);
if IsConnect then ... else ...

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