Code:

uses

SHDocVw_TLB; // http://www.euromind.com/iedelphi if don't have that unit

function GetSelectedIEtext: string;

var

x: Integer;

Sw: IShellWindows;

IE: HWND;

begin

IE := FindWindow('IEFrame', nil);

sw := CoShellWindows.Create;

for x := SW.Count - 1 downto 0 do

   if (Sw.Item(x) as IWebbrowser2).hwnd = IE then begin

     Result := variant(Sw.Item(x)).Document.Selection.createRange.Text;

     break;

   end;

end;