// Put a TApplicationEvents component on your form and assign a OnMessage event handler:
procedure TfrmMyBrowser.ApplicationEvents1Message(var Msg: tagMSG;
var Handled: Boolean);
begin // check if Ctrl-N pressed
if (GetKeyState(VK_CONTROL) < 0) and (Msg.Message = WM_KEYDOWN) and
(Msg.wParam = Ord('N')) then
begin Handled := True;
end;
end;