UCalc Fast Math Parser for LabVIEW?

Question

Several customers have been using the uCalc math parser product with LabVIEW.  Recently one LabVIEW / uCalc user has attracted my attention to the fact that the new version of uCalc FMP is now harder to use with LabVIEW.  Direct support for LabVIEW was never figured into the design of uCalc.  It just so happened that the older uCalc version worked with it.  Now, I’d like to figure out if there are enough potential uCalc FMP users to make it worth adding direct support for LabVIEW.
uCalc FMP lets you evaluate math expressions that are defined at runtime.  You can define functions, operators, and variables, and use them in your formulas.  The older version that is easier to use with LabVIEW can be found at www.ucalc.com/mathparser/ucfmp20.zip (you won’t find the old version in the current download page for now).
I myself have no experience with LabVIEW.  However, with some 3rd party help, the user who contacted me recently was able to interface the new uCalc version with LabVIEW.  Perhaps LabVIEW developers may want to weigh in.  Might you be able to create an “official” uCalc FMP wrapper for the current version of uCalc, or give some tips on what it would take for me to do it?
Daniel Corbier
www.ucalc.com

Answer 1

In the previous DLL, I exported a series of functions such as an eval routine that returns the result of evaluating an expression, as in
ucEval("5+4")
which would return 9; a routine to define functions as in
ucDefineFunction("Area(length, width) = length * width")
or variables as in
ucDefineVariable("MyVar = 123") 
plus a list of other routines.
The new version was completely redesigned.  You can do a lot more.  However, one exported function named uCalc() encapsulates most of the component's functionality.  Instead of exporting many routines from the DLL, wrappers for routines like ucEval, ucDefineFunction, ucParse, etc., are defined in include files for the supported compilers.  On the surface, things run roughly the same for the supported compilers, despite the changes under the hood.  But apparently not so for LabVIEW.
ucDefineVariable for instance, which previously was directly exported from the uCalc DLL is now defined as follows in the include file for Visual Basic (classic):
Public Function ucDefineVariable(Definition As String, Optional ItemAddress As Long = 0, Optional ByVal t As Long = 0) As Long
   Dim ItemDef$
   ItemDef$ = "Var: " + Definition
   If ItemAddress Then ItemDef$ = ItemDef$ + " At " + Str$(ItemAddress)
   ucDefineVariable = uCalc(uc_Define, ItemDef$, 0, 0, 0, t)
End Function
By the way, what is the link to download the evaluation version of LabVIEW?  I found links for the tutorial.  And there's a "Test-Drive LabView" link that brings me to an online evaluation version.
Daniel Corbier
www.ucalc.com