Code:

{

The example below demonstrates creating custom caret:

}

unit Unit1;

interface

uses

Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,

ExtCtrls, StdCtrls;

type

TForm1 = class(TForm)

   Memo1: TMemo;

   Image1: TImage;

   Edit1: TEdit;

   procedure Memo1MouseDown(Sender: TObject; Button: TMouseButton;

     Shift: TShiftState; X, Y: Integer);

   procedure Edit1MouseDown(Sender: TObject; Button: TMouseButton;

     Shift: TShiftState; X, Y: Integer);

private

   { Private declarations }

public

   { Public declarations }

end;

var

Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Memo1MouseDown(Sender: TObject; Button: TMouseButton;

Shift: TShiftState; X, Y: Integer);

begin

CreateCaret(Memo1.Handle, Image1.Picture.Bitmap.Handle, 0, 0);

ShowCaret(Memo1.Handle);

end;

procedure TForm1.Edit1MouseDown(Sender: TObject; Button: TMouseButton;

Shift: TShiftState; X, Y: Integer);

begin

CreateCaret(Edit1.Handle, 0, 10, 4);

ShowCaret(Edit1.Handle);

end;

end.

{The form file source (*.dfm) }

object Form1: TForm1

Left = 192

Top = 107

Width = 544

Height = 375

Caption = 'Form1'

Color = clBtnFace

Font.Charset = DEFAULT_CHARSET

Font.Color = clWindowText

Font.Height = -11

Font.Name = 'MS Sans Serif'

Font.Style = []

OldCreateOrder = False

PixelsPerInch = 96

TextHeight = 13

object Image1: TImage

   Left = 12

   Top = 4

   Width = 16

   Height = 16

   AutoSize = True

   Picture.Data = {

     07544269746D6170B6020000424DB602000000000000B6000000280000001000

     0000100000000100100000000000000200000000000000000000100000000000

     000000000000000080000080000000808000800000008000800080800000C0C0

     C000808080000000FF0000FF000000FFFF00FF000000FF00FF00FFFF0000FFFF

     FF00000000000000000000000000000000000000000000000000000000000000

     0000000000000000000000000000000000000000000000000000000000000000

     000000000000FF7FFF7FFF7FFF7F000000000000FF7FFF7FFF7FFF7FFF7FFF7F

     00000000FF7FFF7FFF7FFF7F000000000000FF7FFF7FFF7FFF7FFF7FFF7F0000

     0000FF7FFF7FFF7FFF7FFF7F00000000FF7FFF7FFF7FFF7FFF7FFF7FFF7F0000

     000000000000FF7FFF7FFF7F0000000000000000FF7FFF7FFF7FFF7F00000000

     0000000000000000FF7FFF7FFF7FFF7FFF7FFF7FFF7FFF7FFF7FFF7F00000000

     0000000000000000FF7FFF7FFF7FFF7FFF7FFF7FFF7FFF7FFF7F000000000000

     0000000000000000FF7FFF7FFF7F00000000FF7FFF7FFF7FFF7F000000000000

     00000000000000000000FF7FFF7FFF7FFF7FFF7FFF7FFF7F0000000000000000

     00000000000000000000FF7FFF7FFF7FFF7FFF7FFF7FFF7F0000000000000000

     000000000000000000000000FF7FFF7FFF7FFF7FFF7FFF7F0000000000000000

     000000000000000000000000FF7FFF7FFF7FFF7FFF7F00000000000000000000

     0000000000000000000000000000FF7FFF7FFF7FFF7F00000000000000000000

     0000000000000000000000000000FF7FFF7FFF7F000000000000000000000000

     00000000000000000000000000000000FF7F0000000000000000000000000000

     0000}

end

object Memo1: TMemo

   Left = 12

   Top = 36

   Width = 149

   Height = 149

   Lines.Strings = ('Memo1')

   TabOrder = 0

   OnMouseDown = Memo1MouseDown

end

object Edit1: TEdit

   Left = 220

   Top = 60

   Width = 121

   Height = 21

   TabOrder = 1

   Text = 'Edit1'

   OnMouseDown = Edit1MouseDown

end

end