Can function points be used with object oriented development?
Yes. You probably see the pattern here! The short answer is that they can be used to measure these applications and their size is the same as if object oriented development had not been used. This is because the function point count for an application is independent of the technology used to develop the application. However, the use of object orientation does tend to impact the function point count of the project that builds the application. In the simplest case of software development, an application is built from scratch by a single project. In this case, the application and project function point counts are the same. For example, building a 1000 function point system would be a 1000 function point project. Object orientation is quickly making this simple approach to application building a thing of the past! At a minimum, using object oriented development techniques allows the developer to use pre-built Windows editing controls and the like.
