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procedure TForm1.Button1Click(Sender: TObject);
var
  a:array[0..1] of char;
begin
  a[0]:='A';
  a[1]:='B';
  self.IdUDPClient1.SendBuffer('127.0.0.1',1984,a,sizeof(a));
end;

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procedure TForm1.IdUDPServer1UDPRead(Sender: TObject; AData: TStream;
  ABinding: TIdSocketHandle);

var
  sStream: TStringStream;
  a:array[0..1] of char;
  i:integer;
begin
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