I have a problem with loading/using a 32-bit DLL. I am using this web site as advice: http://stat.ethz.ch/R-manual/R-devel/library/base/html/dynload.html
I want to load the swedll32.dll (C: which is compiled using: Visual Studio and another version is done with MinGW). The documentation (to use the dll is here: ftp://ftp.astro.com/pub/swisseph/doc/swisseph.htm#_Toc502931278 )
x <- dyn.load("swedll32.dll")
x
gives:
DLL name: swedll32
Filename: C:/Users/VRHome/Documents/R/ARCHAECOSMO/ARCHAEOCOSMO/swedll32.dll
Dynamic lookup: TRUE
It looks to be loaded:
getLoadedDLLs()
#...
swedll32 C:/Users/VRHome/Documents/R/ARCHAECOSMO/ARCHAEOCOSMO/swedll32.dll
#...
swedll32 TRUE
But:
getDLLRegisteredRoutines(x)
gives:
data frame with 0 columns and 0 rows
and using https://darrenjw.wordpress.com/2010/12/30/calling-c-code-from-r/ to run a function in the dll:
.C("swe_get_tid_acc")
Error in .C("swe_get_tid_acc") :
C symbol name "swe_get_tid_acc" not in load table
So the issue might be that the swedll32 routines (C-functions) are not registered ('data frame' is 0 by 0)... So perhaps I need to register the functions in similar way (https://en.wikipedia.org/wiki/Dynamic-link_library#Microsoft_Visual_Basic_2) as VBA? But how, what information do I need to ask from the dll author?
Any hints to get this to work is welcome. I am new to using DLLs as part of other code (I use this dll in VBA for Excel plug-in). Thanks in advance
All the best,
Victor
