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Код

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Buttons, ScktComp;

type
  TForm1 = class(TForm)
    ClientSocket1: TClientSocket;
    ServerSocket1: TServerSocket;
    BitBtn1: TBitBtn;
    procedure ClientSocket1Read(Sender: TObject; Socket: TCustomWinSocket);
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure ClientSocket1Disconnect(Sender: TObject; Socket: TCustomWinSocket);
    procedure ClientSocket1Connect(Sender: TObject; Socket: TCustomWinSocket);
    procedure ServerSocket1ClientConnect(Sender: TObject; Socket: TCustomWinSocket);
    procedure BitBtn1Click(Sender: TObject);
  private
    FStream: TFileStream;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.ClientSocket1Read(Sender: TObject;
  Socket: TCustomWinSocket);
var  
  iLen: Integer;  
  Bfr: Pointer;
begin
  iLen := Socket.ReceiveLength;  
  GetMem(Bfr, iLen);
  try  
    Socket.ReceiveBuf(Bfr^, iLen);  
    FStream.Write(Bfr^, iLen);
  finally  
    FreeMem(Bfr);  
  end;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  FStream := nil;
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  if Assigned(FStream) then  
  begin  
    FStream.Free;
    FStream := nil;  
  end;
end;

procedure TForm1.ClientSocket1Disconnect(Sender: TObject;
  Socket: TCustomWinSocket);
begin
  if Assigned(FStream) then  
  begin  
    FStream.Free;
    FStream := nil;  
  end; 
end;

procedure TForm1.ClientSocket1Connect(Sender: TObject;
  Socket: TCustomWinSocket);
begin
  FStream := TFileStream.Create('C:\Temp\20MJW2.jpg', fmCreate or fmShareDenyWrite);
end;

procedure TForm1.ServerSocket1ClientConnect(Sender: TObject;
  Socket: TCustomWinSocket);
begin
  Socket.SendStream(TFileStream.Create('C:\Temp\20MJW.jpg', fmOpenRead or fmShareDenyWrite));
end;

procedure TForm1.BitBtn1Click(Sender: TObject);
begin
  ServerSocket1.Active := True;  
  ClientSocket1.Active := True;
end;

end.