Source code? You mean the VMS fiche ? Sorry - at one time I had access to a set, but no more... If you Google NML$PROCESS_NICE Did that last night :-) There's not a lot, but I did find Nick deSmith's netname.c example, and one other little code fragment, which was helpful. The "Callback routine" is handed a descriptor. I saw that. I was really hoping that the callback routine received an extra generic parameter (like a Windows lParam or a VMS AST parameter) so that the caller of NML$PROCESS_NICE could pass arbitrary additional arguments to the callback. It doesn't look like that happens, though, so if the callback wants to store or save any of the data that it gets, then it has to do it globally. library module "$NMADEF" in the system called LIB. Got that. Actually on OVMS 7.3 I don't have SYS$LIB_C.TLB or nmadef.h - from some of the web comments I found, it sounds like those might exist only on Alpha. No matter, though - $NMADEF is in MACRO32 is in LIB and it's simple to extract $NMADEF to a MAR file. A little bit of emacs magic turned it into a .h. The real problem is that there are no comments in $NMADEF, and my NICE spec (AA-X437A-TK) only gives numeric values for everything. It's kind of "take your best guess" as to which named constant actually corresponds to the item you want. Avoid the nameless constant values; include NMADEF from the library and use its constant definitions. Agreed! Call NML$INITIALIZE; no parameters. Call NML$PROCESS_NICE; NML request by descriptor, callback routine Call NML$TERMINATE; no parameters. The only serious piece I'm missing at this point is, what do you do if you want to talk to NML on another node besides your own (e.g. "TELL yoyo SHOW EXEC CHAR") ? There doesn't seem to be any NICE function that can be embedded in the data stream to do this, and that wouldn't really make sense anyway. That'd be like asking the local NML to talk to the remote one on your behalf, and I don't think that's the way it works. It seems like there should be some parameter to either NML$INITIALIZE or NML$PROCESS_NICE that gives the node and access control information, but I don't find any reference to that. Thanks again for all the help, Brian. Bob