code: public boolean doCommand(String strCommand, ScreenField sourceSField, int iCommandOptions)
      {
          if (JnlpFileScreen.WRITE_FILE.equals(strCommand))
          {
              return true;    // Command handled
          }
          else
              return super.doCommand(strCommand, sourceSField, iCommandOptions);
      }
docs: Process the command.
  <br />Step 1 - Process the command if possible and return true if processed.
  <br />Step 2 - If I can't process, pass to all children (with me as the source).
  <br />Step 3 - If children didn't process, pass to parent (with me as the source).
  <br />Note: Never pass to a parent or child that matches the source (to avoid an endless loop).
  @param strCommand The command to process.
  @param sourceSField The source screen field (to avoid echos).
  @param iCommandOptions If this command creates a new screen, create in a new window?
  @return true if success.