The Visual Basic - Quintus Prolog interface consists of the following files:
vbqp.dll (The Prolog code and Quintus runtime)
vbqp.bas (The Visual Basic code)
In order to use the interface, perform the following steps:
vbqp.bas in your Visual Basic project.
vbqp.dll in a place where DLLs are searched for (for example
the same directory as your applications EXE file or the Windows-System
directory). Alternatively put it in quintus-dir\bin\ix86\
and ensure that quintus-dir\bin\ix86\ is in the PATH
environment variable.
qpvars.bat or by putting quintus-dir\bin\ix86\ in
the PATH environment variable.