var
RE: TRasEntry;
DEV: array[1..100] of TRASDEVINFO;
i, j,cnt: integer;

begin
 j := sizeof(DEV)*100;
 DEV[1].dwSize := sizeof(TRASDEVINFO);
 i := RasEnumDevicesA(@DEV[1], j, cnt); 
 Memo1.Lines.Add('j ='+IntToStr(j)+' i='+IntToStr(i)+' cnt='+IntToStr(cnt));
 if i <> 0 then Memo1.Lines.Add('ошибка!');
 For i := 1 to cnt do Memo1.Lines.Add(DEV[i].szDeviceType+' = '+DEV[i].szDeviceName);

 RasCreatePhoneBookEntry(Form1.Handle,'111');
 Fillchar(RE, sizeof(TRasEntry), 0);
 RE.dwSize := sizeof(TRasEntry);
 RE.dwfOptions := 66832;
 //RASEO_RemoteDefaultGateway + RASEO_Custom + RASEO_RequireCHAP +   RASEO_ShowDialingProgress;
 RE.dwCountryID := 7;
 RE.dwCountryCode := 7;
 RE.szAreaCode := '';
 RE.szLocalPhoneNumber := '1241241';
 RE.dwfNetProtocols := RASNP_Ip;
 RE.dwFramingProtocol := RASFP_Ppp;
 RE.szDeviceType := 'vpn';
 RE.szDeviceName := 'WAN Miniport (L2PTP)';
 RE.szDeviceType := RASDT_Isdn;

 try
  i := RasSetEntryPropertiesA(nil, 'Имя соединения', @RE, sizeof(TRasEntry), nil, 0);
  if i = ERROR_BUFFER_INVALID then Memo1.Lines.Add('The address or buffer specified by lpRasEntry is invalid');
  if i = ERROR_CANNOT_OPEN_PHONEBOOK then Memo1.Lines.Add('The phone book is corrupted or missing components');
 except end
end;