Creating own datatypes/handles

Hello!
I have a C library which has differents functions that expect various handles (uint32) as parameters. Calling these functions from within LabVIEW is not a problem. What I want to do is make these handles avaible to the outside, accessible through a SubVI connector, somehow comparable to the "Tasks" in DAQmx functions. I can without problem give them as uint32, however this way different types of handles can easily get mixed up as they all appear as blue lines and look like some integers and are not typechecked at all.
Is there a possibility to create own datatypes in LabVIEW that basically can be translated to a simple uint32 in order to pass them to a DLL but to avoid mixing up different types of handles outside of the SubVI. It would be comparable to some C "typedef" with additional typechecking when they are passed to a SubVI. This would simplify the use of the VIs I am creating siginificantly as errors with mixed up handles are very hard to spot and cause major run-time errors. Additionally it would be very helpful if it was able to create its own coloring/design for the lines and connectors to make the block diagram look cleaner.
I am using LabVIEW 8.5.1.
Best regards!

Two ideas come to mind.
Type cast your U32 as an datalog reference. That will only give you the option for a green wire. But its traditional and has been around for a long time.
LVOOP lets you define the appearence of the wires used by a class. So wrapping your dll inside a privat method in its class will give you custom wires.
Ben
Message Edited by Ben on 03-12-2009 01:07 PM
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction
Attachments:
Wire_Colors.PNG ‏26 KB

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