Grid computing is becoming more popular. The traditional role of the Internet as being an information repository is evolving to become a resource repository. People using the Internet want to do more than just look for information, they want to exploit the resources available. Grid computing provides platforms to facilitate such requirements. Various grid middlewares have been developed to offer access to vast resources ranging from computing power to application functionality to specialised physical resources. This paper details the programming model used for heterogeneous environments exploited by WebCom-G. In addition to describing the tools and methodologies used for this computing environment, a brief outline of WebCom-G (WebCom grid) and some of its capabilities is given.