LAN Web TCP Delphi

Title: Refresh all Internet Explorer Windows?
uses
MSHTML_TLB, SHDocVw_TLB;
procedure TForm1.Button1Click(Sender: TObject);
var
ShellWindow: IShellWindows;
WB: IWebbrowser2;
spDisp: IDispatch;
IDoc1: IHTMLDocument2;
k: Integer;
begin
ShellWindow := CoShellWindows.Create;
for k := 0 to ShellWindow.Count do
begin
spDisp := ShellWindow.Item(k);
if spDisp = nil then Continue;
spDisp.QueryInterface(iWebBrowser2, WB);
if WB nil then
begin
WB.Document.QueryInterface(IHTMLDocument2, iDoc1);
if iDoc1 nil then
begin
WB := ShellWindow.Item(k) as IWebbrowser2;
WB.Refresh;
end;
end;
end;
end;