unit URcrdIO;

interface

uses
  SysUtils, WinTypes, WinProcs, Messages, Classes, Graphics, Controls,
  Forms, Dialogs, StdCtrls, dbtables;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Memo1: TMemo;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

type
  TMyRec = record
    MyArray: array[1..1000] of char;
    mystr: string;
  end;

var
  Form1: TForm1;
  MyRec: TMyRec;
  mylist: TStringlist;
  PMyChar: PChar;
  myfile: file;
  mb: TStream;
implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);

begin

  assignfile(myfile, 'c:\testblob.txt');
  rewrite(myfile, 1);
  fillchar(MyRec.MyArray, sizeof(MyRec.MyArray), #0);
  pmychar := @MyRec.MyArray;
  StrPCopy(pmychar, memo1.text);
  Blockwrite(MyFile, MyRec, SizeOf(MyRec));
  closefile(MyFile);
end;

procedure TForm1.Button2Click(Sender: TObject);
begin

  assignfile(myfile, 'c:\testblob.txt');
  reset(myfile, 1);
  fillchar(MyRec.MyArray, sizeof(MyRec.MyArray), #0);

  Blockread(MyFile, MyRec, SizeOf(MyRec));
  pmychar := @MyRec.MyArray;
  Memo1.SetTextBuf(pmychar);
end;

end.