Crystal Reports for Rational Application Developer 设计员指南
两个数字的和 - Crystal 语法
Function (NumberVar Num1, Numbervar Num2) Num1 + Num2
Business Objects,SAP 子公司
http://www.china.businessobjects.com/
支持服务
http://www.china.businessobjects.com/support/
Web 上的产品文档
http://support.businessobjects.com/documentation/