Using Labview.lib in Borland

[Cathryn]

I'm trying to write a dll in Borland for use in LabVIEW, where at a certain point the dll will set an Occurrence.

I've referred to "Setting Occurrences from C in Windows", and followed the instructions. The problem is that I get the error "LABVIEW.LIB contains invalid OMF record, type 0x21 (possibly COFF)". Now I know that this means that the lib was created for Visual C, and not Borland - but what can I do about it? I've tried coff2omf supplied with Borland, but I get a truncated lib file; I would try implib, but I don't have the dll file, only the lib.

Is there a way to convert labview.lib to a format that Borland can use (I'm using BCB 6.0), or is there a borland version of labview.lib available?

[Cathryn]

Okay, I've found the solution, which I'll post here for future reference for anyone who comes across the same problem!

The trick is finding that lvrt.dll contains the Occur function (and I assume the other functions in labview.lib). Then it's just a case of using impdef and implib, as described at http://www.bcbdev.com/articles/vcdll.htm

[Cathryn]

Latest update: that solution doesn't actually work. It seems to, and everything compiles, but the functions that you call from labview.lib/lvrt.dll return errors, while the exact same code works perfectly under LabWindows/CVI.

[Cathryn]

My final update on the subject, just for posterity (and anyone else who comes along later with a similar problem):

It now works, using Borland. The problem was that I didn't create a .lib for lvrt.dll properly: I followed the instructions at http://www.bcbdev.com/articles/vcdll.htm, but in my new .def file I only created an alias for the one function I was interested (Occur), and not all the related functions (such as AllocOccur, etc). Once I recreated the .def file with all the needed aliases, and then recreated my .lib file, everything works perfectly.