Any chance the jlib.h header file will make it before the final build?
Also, as you might expect, the lab "DLL: Writing and Using a DLL" does not work out of the box on Win64. After fixing up the project and rebuilding the DLL for x64 it works fine. Thanks for providing the lab in the distribution, now that I'm more up to speed in the J environment I can see it's the quickest way to sort this stuff out. Using a debugger attached to the java process it's easy to see that J64 is doing the right thing on Win64 including passing doubles in XMM registers.
Regards, Joseph ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
