The number of end-users using the Internet increases on the inside and outside of offices. Enduser-initiative development of applications has become important for automation of their own tasks. Especially, applications for web services should be supported by business professionals themselves because web services must be modified frequently. This paper describes enduser-initiative application development methodologies for the MOON(multiagent-oriented office network) systems including window work in B-to-C and B-to-B electronic commerce. The window work is considered as a metaphor of the interface between service providers and their clients for web services. The front-end of the system is constructed by a multi-agent framework. The back-end is developed by modeling techniques. The multi-agent framework is a Java application framework and is designed based on the simple concept that "one service = one form." It provides form-based interfaces as a common XML-base protocol of {who, what, how} for end-users, which protocol corresponds to the UDDI protocol of {white, yellow, green} pages. Then form transformation from an input form into output forms implies service integration. Prototyping for the front-end system and the back-end system is performed in Java and XML.