Найти позицию каретки

function GetCaretPosition(var APoint: TPoint): Boolean;
var w: HWND;
  aID, mID: DWORD;
begin
  Result:= False;
  w:= GetForegroundWindow;
  if w <> 0 then
  begin
    aID:= GetWindowThreadProcessId(w, nil);
    mID:= GetCurrentThreadid;
    if aID <> mID then
    begin
      if AttachThreadInput(mID, aID, True) then
      begin
        w:= GetFocus;
        if w <> 0 then
        begin
          Result:= GetCaretPos(APoint);
          Windows.ClientToScreen(w, APoint);
        end;
        AttachThreadInput(mID, aID, False);
      end;
    end;
  end;
end;


//Small demo: set cursor to active caret position 
procedure TForm1.Timer1Timer(Sender: TObject);
var
  Pt: TPoint;
begin
  if GetCaretPosition(Pt) then
  begin
    ListBox1.Items.Add(Format('Caret position is %d %d', [Pt.x, Pt.y]));
    SetCursorPos(Pt.X, Pt.Y);
  end;
end;