> Your reply has triggered a thought which may solve an upcoming problem > for me. I need to be able to give a customer the ability to call a function > within code that I have written, but, I don't want to give him my source. Is > it possible using the method described in your reply i.e. a runtime library, > to allow him to compile his code together with my functions without him ever > having to see my source? Yes. However, PIC code is not that hard to disassemble. Nothing is absolutely secure, but it's "secure enough" if the effort to break the security isn't worth what is gained by the secure information. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu