DOS Type into a variable

[Michael Ryan <michaelrtr@xxxxxxxxx>]

Old version of DOS, kinda stripped down, but it seems to have most stuff.
What I want to do is this in a command file:

type filea.txt | commandfileb.cmd

And then commandfileb.cmd needs to do something with the content of
filea.txt.

Anyone know how to do this in a DOS command file? commandfileb.cmd doesn't
seem to get the passed parameter...I've tried a bunch of methods, and
nothing seems to work.

Thanks!