HP 3000 Manuals

HP ALLBASE/4GL Developer Reference Manual Vol. 1

Constant Referencing 

You can reference an alphanumeric constant by using the constant name
prefixed by C-.

You can reference a substring of an alphanumeric constant.

Formats 

     C-name 
     C-name[start_pos,number_of_chars]

MPE/iX 5.0 Documentation