This is really a programming topic, and not an integration and Web services topic, but I'll give it a shot. You can develop a Web service client which is able to talk to a J2EE based Web service (the server) using VB 6, but only at the low level. A better idea would for you to leverage product such as those from Dream Factory that are purposed for such a thing.
Dig Deeper on Topics Archive
Related Q&A from David Linthicum
David Linthicum explains what advanced business application programming (ABAP)/4 means. Continue Reading
David Linthicum defines Service Component Architecture (SCA) and Service Data Objects (SDO) and explains how to best build these components to enable... Continue Reading
David Linthicum explains how it is possible that Apache Tomcat is both a Web server and an application server. Continue Reading