unit Unit1;    interface    uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, IdBaseComponent, IdComponent, IdTCPConnection,
  IdTCPClient;    type
  TForm1 = class(TForm)
    IdTCPClient1: TIdTCPClient;
    Button1: TButton;
    Edit1: TEdit;
    Edit2: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;    var
  Form1: TForm1;    implementation    {$R *.dfm}    procedure TForm1.Button1Click(Sender: TObject);
var
t2 : tmemorystream;
begin
    try
     IdTCPClient1.Host := edit1.Text ;
     IdTCPClient1.port := 1111;//strtointdef(edtPort.text,5566);
     IdTCPClient1.Connect;
     t2 := tmemorystream.Create;
     t2.LoadFromFile(edit2.Text);
     t2.savetostream(t2);
     IdTCPClient1.WriteStream(t2,true,true);
    finally
     t2.Free;
     IdTCPClient1.Disconnect;
    end;
end;    end.

抓取檔名（包括副檔名）可用ExtractFileName函數﹐使用方法如下﹕
begin
  ShowMessage(ExtractFielName(Edit1.Text));
end;    單抓取副檔名可用ExtractFileExt函數﹐使用方法如下﹕
begin
  ShowMessage(ExtractFileExt(Edit1.Text));
end;