public static void IOCallback(GuiControl dlg, string callback)
{
GuiPopUpMenuCtrl IODropdownMenu = "IODropdownMenu";
int id = IODropdownMenu.getSelected();
string text = IODropdownMenu.getTextById(id);
callback = callback.Replace("#", text);
omni.console.Eval(callback);
((GuiCanvas)"Canvas").popDialog(dlg);
}