code: public String getScreenURL()
      {
          String strURL = super.getScreenURL();
          if (m_strMenu != null)
          strURL = this.addURLParam(strURL, DBParams.MENU, m_strMenu);
          else if ((this.getAppletScreen() != null) && (this.getAppletScreen().getScreenFieldView().getControl() != null))
          {
              String strMenu = this.getProperty(DBParams.MENU);
              if (strMenu == null)
                  strMenu = Constants.BLANK;
              strURL = this.addURLParam(strURL, DBParams.MENU, strMenu);
          }
          return strURL;
      }
docs: Get the command string that will restore this screen.
  @return The URL for the current screen.