public void btnChangeFontDesc_Click(Office.IRibbonControl control) { try { ContextManager context = new ContextManager(); _isSmallToBig = context.ChangeFontSize(false); ribbon.Invalidate(); } catch (Exception ex) { ManagerException mgrExp = new ManagerException(ErrorCode.ipe_ChangeFontError, MessageUtils.Expand(Properties.Resources.ipe_ChangeFontError, ex.Message), ex.StackTrace); LogUtils.LogManagerError(mgrExp); } }