Bar Code input into SE SQL

My environment is Informix-SQL Version 7.20.UE2 and SE Version 7.24 UC8 Solaris Sparc 7 on an Ultra 10. I have 5 dumb terminals connected to the system. 1) Would I have to use a PERFORM screen, dumb terminal, and a bar code reader together to input data from a bar code into the database? 2) Is it possible to use a remote scanner not attached to a dumb terminal? 3) Would each column in the PERFORM screen have to match the appropriate UPC style 1-dimensional bar code? 4) Would using the 2-dimensional bar code - like United Parcel Service - be incompatible with a PERFORM screen because there are multiple columns of data in one code? Thank you very much.