Is there a range of error codes reserved for user defined error codes?

I would like to create my own error codes for a CVI dll but I want to make sure I don't use error codes already defined for something else. Is there a range reserved for such use?
Samee thing for warnings (errorcode > 0)
Thanks

I have never found a positive mention of a "safe" range of error codes available for user-defined error conditions, but I can suggest you some source of informations.
First of all, every library has its specific list of error codes, usually listed in the relative include file. All these error codes are listed in the online help too (search for "error codes" in the index tab of the help).
Second, GetGeneralErrorString () is a function that can be used to trap errors of the following libraries with a unique error function:
User Interface Library
Easy I/O instrument driver
Toolbox instrument driver
ActiveX Library
DIAdem Connectivity Library
.NET Library
DataSocket instrument driver
Network Variable Library
Real-Time Utility Library
TDM Streaming Library
UDP Support Library
This means that the error codes from this libraries do not overlap, so you could derive from its code some ranges not used by these libraries.
Nevertheless, there is not a single function for error trapping: every library has its proper list of error codes and a function to decode them in human readable form, andthere is no guarantee that these ranges does not overlap. It's up to you to trap errors from every function in the proper way.
Proud to use LW/CVI from 3.1 on.
My contributions to the Developer Zone Community
If I have helped you, why not giving me a kudos?

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