#GPPT Adding Virtual Fields to Item Maintenance Version 2

GP Power Tools Build 32 added Custom Tables as a new feature to the Developer Tools module. Custom Tables can automatically create and maintenance SQL tables in company (or system) databases as defined by the definition in the Custom Tables Setup window.
This is an updated version of the #GPPT Adding Virtual Fields to Item Maintenance project which uses a Custom Table to store the data rather than the DUOS. Easy access to the Custom Tables is provided by a series of Custom Table Buffer Helper Functions which replicate how Dexterity table buffers work.
