If I understand you correctly, it is not possible.
When you run the source code in the DB editor it is is interpreted by the 'compiler' - a program called DB.EXE.
When your own programs are compiled into exe's (with Build Final) they do not contain DB.EXE so they have no way to interpret any .DBA source files you supply with it.
Users of your program must have their own copy of DBC installed to use them - and of course it would be illegal for you to distribute DB.EXE with your program.
Instead you must write your own interpreter/parser.
This isn't that difficult - just long-winded and time consuming.
It means you have to load a line of your text file and chop (parse) it into pieces - separating the commands and parameters. Your program would then run the command specified with the correct parameters.
So, if your program loads the line:
Set Display Mode 800,600,32
...it must extract the command used (Set Display Mode), along with the three numeric parameters (placing them in numeric variables) and use them with the command.
Pseudo code:
Open text file
Read String 1,lineofcode$
Scan line for command & parameters - placing into variables Command$, P1, P2 and P3
If Command$="Set Display Mode"
Set Display Mode P1,P2,P3
Endif
It gets time consuming because you have to write the same routines for
every one of the commands used in the text files.
TDK_Man