I'm NOT a programmer, but...

this *shouldn't* be too difficult, even for me.

An input file I create for another program is a text file. Most of the lines
are the same with every run. My goal is to use Excel to "pre-process" that
input file and then save it.

Can someone either tell me:
a.) the command structure for a routine to do this or,
b.) give me a good reference so that I don't spend my time going down the
wrong path?

Of course, the next step would be to execute that other program from within
Excel and then bring back the results into my spreadsheet, but I'm getting
ahead of myself.

TIA,

Bill