Hardware HANDLE in CIN

Question

I want to use the following code to open a device and return a HANDLE. How do I program my code to do this with a CIN.  I did manage to write a wrapper DLL for the same device and that is working fine, but I trying to do the same with a CIN.
HANDLE PortOpen(VOID)
 hPort = CreateFile ("\\\\.\\SDCI0\\0",
      GENERIC_READ | GENERIC_WRITE,
      0,
      NULL,
      OPEN_EXISTING,
      FILE_ATTRIBUTE_NORMAL,
      NULL);
 return hPort;
Please note I'm a beginner, unfortunately the explanation in the Labview documents is not clear enough for me.

Answer 1

CEE,
I may be missing some of what you're trying to communicate but I still think you could use the CLFN to accomplish the "modular" function calls (open, read, write, close). In the CLFN, you can add dll functions to each instance of the node. So make a vi that calls the "open" function of the dll. Then make another vi that calls the "close" function of the dll. I assume that you already have functions inside the dll that preform the desired actions.
However, if you're still set on using CINs, the "Using External Code In LabVIEW" help is a great resource. (I assume you're using LabVIEW8). If you go to Help>>Fundamentals>>Calling Code Written in Text-Based Programming Languages, I think you'll find some really good information in there. See the attached picture.
Chris C
Message Edited by Chris_C. on 05-30-2006 10:55 AM
Chris Cilino
National Instruments
LabVIEW Product Marketing Manager
Certified LabVIEW Architect
Attachments:
external code help.JPG ‏108 KB