uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,shellapi,Dialogs;

type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;
DesktopIcon: TimageList; // 做一个你喜欢的图象列表

implementation

{$R *.DFM}

procedure TForm1.FormCreate(Sender: TObject);
Var Ico: TIcon;
Sfi: Tshfileinfo;
I : Integer;
begin

//分配一个句柄给图象列表

DesktopIcon:= TImageList.Create(Self);
DesktopIcon.Handle := SHGetFileInfo(‘‘, 0, sfi, SizeOf(TSHFileInfo),
shGFI_SYSICONINDEX or SHGFI_SMALLICON);
DesktopIcon.ShareImages := True;
for I:=0 to DesktopIcon.count -1 do
Begin
Ico := Ticon.Create;
DesktopIcon.GetIcon(I,Ico);
Ico.SaveToFile(c:\icons\+inttostr(i)+.ico);
Ico.Free;
End;
end;

procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
Desktopicon.free;
end;

end.

使用Shell32.dll中的图标资源