Intrefacing dll library in pascal format

Hello list, I am trying to interface the dallas TMex (ibutton) library to rebol. I'ts programmed (the library) in pascal so I don't know if it is possible to interface it with rebol. Sofar it is possible to open a session and do the first setup. After that.....? The problem is with: *short far pascal TMFirst(* *long* /session_handle/*, * // session handle for the desired 1-Wire network *void far **/state_buffer/ // state buffer provided for the 1-Wire network session *); *and: *short far pascal TMRom(* *long* /session_handle/*, * // session handle for the desired 1-Wire network *void far **/state_buffer,/ // state buffer provided for the 1-Wire network session *short far **/ROM/ // buffer to read or write from the internal ROM buffer *); *What do I do with the *state_buffer? The doc says: /state_buffer/ Specifies a pointer to a memory location that TMEX keeps all of the state information for the 1-Wire networks. This parameter is required by most TMEX API functions. I tried in Rebol something like this: tmfirst: make routine! [ session [integer!] buffer [string!] return: [integer!]] tmex-lib "TMFirst" I tried it even with a struct! but also no luck. How do I define "buffer" and how do I pass the buffer-pointer to TMrom? Rebol crashes or the buffer stay's empty. Has someone tried this before or is this something way above my head??? Thanks for your time! Tim

Hi Tim, just dealing with the "buffer" question; Yeah, just pass it in a string prepared like so:

>> insert/dup buffer: make string! 20 "^-" 20

>> buffer

Hi Tim, In addition to Anton's note about prefilling the buffer var, you can also use SHORT in structs, and I believe routines, where there is a short/word on the C/Pascal side. In most cases an integer! will work fine with routine calls, but not with structs. -- Gregg

Hi Anton, Thanks for your suggestion. That was indeed the problem and your solution solved it. Tim Anton Rolls wrote: