"amin-mc" wrote : But (this is probably not possible) is it possible to change/replace a portlet window from interacting with another portlet. For example | | Portlet A | Portlet B | Portlet C | Portlet D | Portlet E | | Currently I can see A, B and C, D. If i interact with D is it possible to change C to E? Or is the only option is to change the content of C? | | Not sure if that made sense! It might be possible using Portal's API (though I haven't tried to do so) but your portlets would not be JSR-168 compliant anymore. There is nothing in the JSR 168 specification to do what you want. Actually, inter-portlet communication (IPC) is outside of the specification so any coordination of work between portlets you are trying to do would have to use a vendor-specific mechanism. This is true for JBoss Portal, but it would also be the case with any other portal vendor. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4100389#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...