Оформил: DeeCo
Автор: http://www.swissdelphicenter.ch

uses
   Winsock;

 function WinsockEnabled: Boolean;
 var
   wsaData: TWSAData;
 begin
   Result := True;
   case Winsock.WSAStartup($0101, wsaData) of
     WSAEINVAL, WSASYSNOTREADY, WSAVERNOTSUPPORTED: Result := False;
     else
       Winsock.WSACleanup;
   end;
 end;

 procedure TForm1.Button1Click(Sender: TObject);
 begin
   if WinsockEnabled then
     ShowMessage('Winsock is enabled')
   else
     ShowMessage('Winsock is disabled');
 end;