This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
Don't know what "-Xrunprog" does; do you mean "-Xrunprof"?
But in any case, the -classpath never refers to DLL files; it can refer to jar files, or to directories. You need to have a closer look at whatever documentation you got this "-Xrunprog" from, and see if you've read it correctly.