Set Classpath during runtime

How can we set classpath to a .jar file during runtime. Is it possible to set classpath not other than editing a .bat file or by manually editing the global variables list?
[186 byte] By [Janeve_Reckonera] at [2007-10-2 10:43:45]
# 1
You need to implement you own Class Loader if you want to load a jar at runtime. Why would you like to do that in AS?
jfarcanda at 2007-7-13 2:53:48 > top of Java-index,Enterprise & Remote Computing,Enterprise Technologies...