What is the best way to organize scanning?

Question

C++ / C#

Good day!
I ran into a problem while working. For more than a decade, they have been using the same software at work. It was developed by our own employees, but everyone who had a relationship with the project has long since left, and only the source code remained from the project. Initially, the software had an additional scanning function, which was implemented using ABBYY FineReader 4.0 using the COM interface. For a long time no one used it, but now it was urgently needed. It is predictable that it is unrealistic to find such an old working version of FineReader, and the code does not work with modern ones due to unavailability of commands. In connection with the impatient superiors, the question arose:
Having the old COM interface and all the written code for working with the program, is it worth looking for software (FineReader, etc.), for which it would be possible to rewrite command codes and again install some kind of common program for scanning on all machines, or is it easier to rewrite completely all the work with the scanner and build in your own methods, which at the very least can be implemented using TWAIN and other similar technologies and forget about additional software?

Answer 1

1) Decent vendors usually send even old versions of the software they bought to honest customers. Write a letter to support, and in the meantime try other options.
2) As already answered above, simply scanning through TWAIN can be started by literally copying the sample code from the network.