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	[x] Attachment Details

Reset network card or how do I fully disable and re-enable (rlibby)

Zone: Delphi Programming

Tags: Network Card any flavor, Delphi

I have several chunks of code that is supposed to reset the network card. One piece of code uses the hnetcfg.dll (ActiveX) and works great, BUT, it only works under Windows XP and higher. I need 2000 support as well.

The other chunk was obtained from code and a component by Russell Libby (rlibby) which keeps the network icon active yet disables any network traffic. Not like a manual disable - enable, which resets the card or like the XP code using the ActiveX.

Snippets are below.

Does anyone have any code that will fully reset a NIC in 2000 and above?

Thanks!

John

         
           
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             // The following is from rlibby using his netstate library.
 
unit Unit1;
 
interface
 
uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls, NetState, IpRtrMib;
 
type
  TForm1 = class(TForm)
    Button1: TButton;
    NetAdapter1: TNetAdapter;
    Memo1: TMemo;
    Button2: TButton;
    procedure NetAdapter1Connect(Sender: TObject; IntfAdapter: _MIB_IFROW);
    procedure NetAdapter1Disconnect(Sender: TObject; IntfAdapter: _MIB_IFROW);
    procedure NetAdapter1StateChange(Sender: TObject; IntfAdapter: _MIB_IFROW; LastState, LastAdminState: Cardinal);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
 
implementation
{$R *.DFM}
 
procedure UpdateInfo(Memo: TMemo; Row: _MIB_IFROW);
begin
  with Memo do
  begin
     Lines.Add(Format('  Name: %s', [InterfaceName(Row)]));
     Lines.Add(Format('  Operational State: %d', [Row.dwOperStatus]));
     Lines.Add(Format('  Admin State: %d', [Row.dwAdminStatus]));
  end;
end;
 
procedure TForm1.NetAdapter1Connect(Sender: TObject; IntfAdapter: _MIB_IFROW);
begin
  Memo1.Lines.Add(Format('%s connected', [InterfaceName(IntfAdapter)]));
  UpdateInfo(Memo1, IntfAdapter);
end;
 
procedure TForm1.NetAdapter1Disconnect(Sender: TObject; IntfAdapter: _MIB_IFROW);
begin
  Memo1.Lines.Add(Format('%s disconnected', [InterfaceName(IntfAdapter)]));
  UpdateInfo(Memo1, IntfAdapter);
end;
 
procedure TForm1.NetAdapter1StateChange(Sender: TObject; IntfAdapter: _MIB_IFROW; LastState, LastAdminState: Cardinal);
begin
  Memo1.Lines.Add(Format('%s state change', [InterfaceName(IntfAdapter)]));
  UpdateInfo(Memo1, IntfAdapter);
  if InterfaceIsConnected(IntfAdapter) then
     Memo1.Lines.Add('-- Connected -- ')
  else
     Memo1.Lines.Add('-- Disconnected -- ');
end;
 
procedure TForm1.Button1Click(Sender: TObject);
var  dwIndex:       Integer;
begin
  for dwIndex:=0 to Pred(NetAdapter1.IntfAdapterCount) do
     NetAdapter1.DisableIntfAdapter(NetAdapter1[dwIndex]);
end;
 
procedure TForm1.Button2Click(Sender: TObject);
var  dwIndex:       Integer;
begin
  for dwIndex:=0 to Pred(NetAdapter1.IntfAdapterCount) do
     NetAdapter1.EnableIntfAdapter(NetAdapter1[dwIndex]);
end;
 
end.
 
//The following uses the Windows XP firewall control ActiveX, hnetcfg.dll and works but ONLY under XP. You // have to import the as an Active X hnetcfg.dll as NETCONLib_TLB and the dll is under system32.
 
uses
 OleServer, NETCONLib_TLB, activeX, ComObj;
 
procedure TFPCClusterMain.ResetNIC(const aConnection: string);
var
  pEnum: IEnumVariant;
  vNetCon: OleVARIANT;
  dwRetrieved: Cardinal;
  pUser: NETCONLib_TLB.PUserType1;
begin
  //enabled := false;
  try
    pEnum := ( NetSharingManager.EnumEveryConnection._NewEnum as IEnumVariant);
    while (pEnum.Next(1, vNetCon, dwRetrieved) = S_OK) do
    begin
       (IUnknown(vNetCon) as INetConnection).GetProperties(pUser);
       if pUser.pszwName = aConnection then
       begin
         (IUnknown(vNetCon) as INetConnection).Disconnect;
         (IUnknown(vNetCon) as INetConnection).Connect;
         delay(2000);
         break;
       end;
    end;
  finally
    //enabled := true;
  end;
end;
 
procedure TFPCClusterMain.GetConnectionList(Strings : TStrings);
var
  pEnum: IEnumVariant;
  vNetCon: OleVARIANT;
  dwRetrieved: Cardinal;
  pUser: NETCONLib_TLB.PUserType1;
  NetCon : INetConnection;
begin
  Strings.Clear;
  pEnum := ( NetSharingManager.EnumEveryConnection._NewEnum as IEnumVariant);
  while (pEnum.Next(1, vNetCon, dwRetrieved) = S_OK) do
  begin
     (IUnknown(vNetCon) as INetConnection).GetProperties(pUser);
     NetCon := (IUnknown(vNetCon) as INetConnection); 
 
     if (pUser.Status in [NCS_CONNECTED,NCS_CONNECTING])//remove if you want disabled NIC cards also
     and (pUser.MediaType in [NCM_LAN,NCM_SHAREDACCESSHOST_LAN,NCM_ISDN] ) then
     begin
       //we only want valid network cards that are enabled
       Strings.Add(pUser.pszwName );
       //IdList.Add(GuidToString(pUser.guidId));
     end;
  end;
end;

           
         

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8.6

Question Stats

Zone: Programming

Question Asked By: Johnjces

Solution Provided By: rllibby

Participating Experts: 1

Solution Grade: A

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