Room76 Expression - Version 2.67.0 Do you need your users to incorporate custom calculations into your product?. Are you writing a software application which requires configurable core calculations?. Room76 Expression is a product that allows you to do just that.Room76 Expression is an ActiveX DLL that can be used to add expression evaluation capability to your software, and can be readily used in any development environment that supports COM components such as Microsoft Visual Basic, C++ or ASP.What sets Room76 Expression apart from most expression evaluation libraries is its extremely straight-forward use and support for numeric/string symbols, literals and functions, in addition to the standard mathematic expression evaluation capabilities. This means that the product can be used to seamlessly evaluate expressions that incorporate math/string functions and numeric/string constants and symbols.