[vadimiron]

Я не программирую в Дельфи, но в немецком инете нашёл следущее, может это то, что нужно

Код:

Function Connection: boolean;

var

flags: dword;

begin

result:= InternetGetConnectedState(@flags, 0);

end;

Добавлено:

А ещё такое нашёл

Код:

interface 
uses 
Windows,SysUtils,Registry,WinSock,WinInet; 
type 
  TConnectionType=(ctNone,ctProxy,ctDialup); 
function ConnectedToInternet:TConnectionType; 
function RasConnectionCount:Integer; 

implementation 
// For RasConnectionCount = = = = = = = = = = = = = = = = = = = = = = = 
const 
cERROR_BUFFER_TOO_SMALL=603; 
cRAS_MaxEntryName=256; 
cRAS_MaxDeviceName=128; 
cRAS_MaxDeviceType=16; 
type 
  ERasError=class( Exception); 
  HRASConn=DWord; 
  PRASConn=^TRASConn; 
  TRASConn=record 
  dwSize:DWORD; 
  rasConn:HRASConn; 
  szEntryName:Array[0..cRAS_MaxEntryName]Of Char; 
  szDeviceType:Array[0..cRAS_MaxDeviceType]Of Char; 
  szDeviceName:Array[0..cRAS_MaxDeviceName]of char; 
end; 
TRasEnumConnections= 
function (RASConn:PrasConn;{ buffer to receive Connections data } 
var BufSize:DWord;{ size in bytes of buffer } 
  var Connections:DWord { number of Connections written to buffer } 
  ):LongInt;stdcall; 
  // End RasConnectionCount = = = = = = = = = = = = = = = = = = = = = = = 
   
function ConnectedToInternet:TConnectionType; 
var 
  Reg:TRegistry; 
  bUseProxy:Boolean; 
  UseProxy:LongWord; 
begin 
  Result:=ctNone; 
  Reg:=TRegistry.Create; 
  with REG do 
  try 
    try 
      RootKey:=HKEY_CURRENT_USER; 
      if OpenKey( '\Software\Microsoft\Windows\CurrentVersion\Internet settings',False) then begin 
        // I just try to read it , and trap an exception 
        if GetDataType( 'ProxyEnable')=rdBinary then 
        ReadBinaryData( 'ProxyEnable',UseProxy,SizeOf( LongWord)) 
        else begin 
          bUseProxy:=ReadBool( 'ProxyEnable'); 
          if bUseProxy then 
          UseProxy:=1 
          else 
          UseProxy:=0; 
        end; 
        if (UseProxy<>0) and (ReadString( 'ProxyServer')<>'') then Result:=ctProxy; 
      end; 
    except 
      // Obviously not connected through a proxy 
      end; 
    finally 
      Free; 
    end; 
    // We can check RasConnectionCount even if dialup networking is not installed 
    // simply because it will return 0 if the DLL is not found . 
    if Result=ctNone then begin 
      if RasConnectionCount>0 then Result:=ctDialup; 
    end; 
  end; 
function RasConnectionCount:Integer; 
var 
  RasDLL:HInst; 
  Conns:Array[1..4]of TRasConn; 
  RasEnums:TRasEnumConnections; 
  BufSize:DWord; 
  NumConns:DWord; 
  RasResult:Longint; 
begin 
  Result:=0; 
  // Load the RAS DLL 
  RasDLL:=LoadLibrary( 'rasapi32.dll'); 
  if RasDLL=0 then exit; 
  try 
    RasEnums:=GetProcAddress( RasDLL,'RasEnumConnectionsA'); 
    if @RasEnums=nil then 
    raise ERasError.Create( 'RasEnumConnectionsA not found in rasapi32.dll'); 
    Conns[1].dwSize:=Sizeof (Conns[1]); 
    BufSize:=SizeOf( Conns); 
    RasResult:=RasEnums( @Conns,BufSize,NumConns); 
    If (RasResult=0) or (Result=cERROR_BUFFER_TOO_SMALL) then Result:=NumConns; 
  finally 
    FreeLibrary( RasDLL); 
  end; 
end;