>I'm not sure what you mean by 'Operating at Binary level', but there was a thread awhile back about changing an external PRG and having the NEW PRG run. It wasn't possible. You MUST compile to an FXP if you're running with just the runtime libraries.
>
>Barbara

"Operating at Binary Level" is :: I am opening the PRG file using Fopen and searchinf for specified functions as XYZ(), now adding a new function, NEW() to the previous one so that, the result code looks as NEW(XYZ()).

I could use EVAL(), but I am looking at checking SYNTACTICAL errors at complete PRG level ie file level.