In V2 and later, FairCom RTG introduces support for redirecting BTRV calls to other BTRV interfaces such as Pervasive Software / Actian Corporation Btrieve.
Use the <redirinstance> configuration element and specify the library and the entry-point function, which must have the prototype of the BTRCALLID function, using <redirinstance lib="mylib" func="myfunc"> attributes.
The following is a configuration example to redirect to Pervasive Btrieve:
<redirinstance lib="C:\PVSW\Bin\WBTRV32.DLL" func="BTRCALLID">
<file name="*.btr"/>
</redirinstance>