var 
  bmp, caretbild: TBitmap; 
 
procedure zeigeKursor; 
begin 
  with Form1 do begin 
    if activecontrol = Richedit1 then begin 
      createcaret(Richedit1.handle, caretbild.handle, 0, 0); 
      showcaret(Richedit1.handle); 
    end; 
  end; 
end; 
 
procedure TForm1.FormCreate(Sender: TObject); 
var faktor: double; 
begin 
  application.OnActivate := Formpaint;
  application.OnRestore := Formpaint;
  keypreview := true; 
  Richedit1.parentfont := true; 
  Richedit1.color := clwhite; 
  Richedit1.wantTabs := false; 
  bmp := TBitmap.create; 
  bmp.loadfromfile('d:\bilder\arrow.bmp'); 
  faktor := bmp.height / bmp.width; 
  caretbild := TBitmap.create; 
  caretbild.height := canvas.textheight('Dummy'); 
  caretbild.width := round(caretbild.height / faktor); 
  stretchblt(caretbild.canvas.handle, 0, 0, caretbild.width, caretbild.height, 
    bmp.canvas.handle, 0, 0, bmp.width, bmp.height, NOTSRCCOPY); 
  bmp.free; 
end; 
 
procedure TForm1.FormDestroy(Sender: TObject); 
begin 
  caretbild.free; 
end; 
 
procedure TForm1.FormPaint(Sender: TObject); 
begin 
  zeigeKursor; 
end; 
 
procedure TForm1.RichEdit1MouseUp(Sender: TObject; Button: TMouseButton; 
  Shift: TShiftState; X, Y: Integer); 
begin 
  zeigeKursor; 
end; 
 
procedure TForm1.FormKeyUp(Sender: TObject; var Key: Word; 
  Shift: TShiftState); 
begin 
  zeigeKursor; 
end;