"jhidalgo" wrote : I would like to know how to call a C function from within a Web Service I would like to say that I already tried the following: I built a JNI library under Windows, which operates without any problem when called from a Java Application and try to call it from within a Web Service deployed under JBoss running under Windows 2003 without success. I placed the library (dll), built with Microsoft Visual C on several directories: JBOSS_HOME/bin, JBOSS_HOME/server/default/deploy and WINDOWS_SYSTEM, but I never could call the functions of the library from within a Web Service (I got an exception, aborting the Web Service in the tree scenarios). Could anybody tell me whether it is possible to call a JNI library from within a Web Service, please? Is there something special to do to achieve what I want? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4026958#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...