Hola, pos no lo entiendo, yo lo he probado y me funciona
Código Delphi
[-]
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Edit1: TEdit;
ComboBox1: TComboBox;
procedure ComboBox1DrawItem(Control: TWinControl; Index: Integer;
Rect: TRect; State: TOwnerDrawState);
procedure ComboBox1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
public
end;
var
Form1: TForm1;
LastSelect : Integer;
implementation
{$R *.dfm}
procedure TForm1.ComboBox1DrawItem(Control: TWinControl; Index: Integer; Rect: TRect; State: TOwnerDrawState);
var bTemp:TBitmap;
begin
bTemp := TBitmap.Create;
with (Control as TComboBox) do begin
if Index = LastSelect then Canvas.Brush.Color := $00CCCC;
Canvas.FillRect(Rect);
Canvas.TextOut(Rect.Left,Rect.Top,Items[Index]);
Canvas.Draw(Rect.Left + 2,Rect.Top + 2,bTemp);
end;
bTemp.Free;
end;
procedure TForm1.ComboBox1Click(Sender: TObject);
begin
LastSelect := ComboBox1.ItemIndex;
Edit1.Text := ComboBox1.Items.Strings[LastSelect];
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
LastSelect := -1;
end;
end.
Saludos