explanation of the syntax of reminder

Forgive my beginner questions.

I am trying to understand the syntax of the callback functions that are auto-insérée in my source of CVI.  I'm not entirely understand what's the point of "CVICALLBACK" in front of my name of callback function.

int CVICALLBACK ControlCallback (int panel, int control, int event, void *callbackData, int eventData1, int eventData2)

I dive into cvidef.h, I see that it is defined as CVICDECL, which in turn is defined as __cdecl, which is apparently a "calling convention".  So CVICALLBACK is just a secondary typedef for the callback function?

You were right from CVICALLBACK to the convention corresponding appeal. The calling convention is a very technical beast to explain, unless you are particularly interested in him (for example because you want to / have to build DLLs to be used ion other compilers or symmetrically, you can use the DLL created in other languages) you can simply ignore it and happily live and work with CVI

However, information about the calling convention can be easily found on the internet: here and here two wikipedia pages on the subject, so that here , you will find a page of knowledge base specifically oriented CVI

Tags: NI Software

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