unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls, ComCtrls;

type
  TForm1 = class(TForm)
    StatusBar1: TStatusBar;
    RichEdit1: TRichEdit;
    procedure RichEdit1KeyUp(Sender: TObject; var Key: Word;
      Shift: TShiftState);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}
procedure CaretPos(H: THandle; var L,C : Word);
begin
  L := SendMessage(H,EM_LINEFROMCHAR,-1,0);
  C := LoWord(SendMessage(H,EM_GETSEL,0,0)) - SendMessage(H,EM_LINEINDEX,-1,0);
end;

procedure TForm1.RichEdit1KeyUp(Sender: TObject; var Key: Word;
  Shift: TShiftState);
var
  LineNum,ColNum : Word;
begin
  CaretPos(RichEdit1.Handle,LineNum,ColNum);
  Statusbar1.Panels[0].Text := format('Line %d   Col %d',[LineNum,ColNum]);
end;

end.