How is it possible to read data from a serial port using baud-mode N2400
(inverted output) using VBA?

I wish to match the incoming decimal number  to an possible stock database,
reading the row and inputting it into a "in-stock" database i also wish to be
able to receive extra signals that assign attributes to the stock tthrough
the serial port, if the item's entry into the possible stock database
requests an extra commands, that the database sends a serial request through
the serial port on a differing pin asking for the extra data. It is just the
database that requires solving as the other end of the system is a custom
built datapad system running off of a microcontroller.

As i said before the baud mode of the serial connection is inverted 2400, if
any more information is required, please ask.