Copy from one file to another......

How do I copy the contents (all text) from one file and re-write it at the EOF of another?

Currently what I'm doing is reading the 1st file and placing it into a listbox then writing the contents of the list box into the second file.

There has to be a faster way.

TIA,
Mike

Why put it in a listbox? Just read the one file into a string, ten open the second file and write the string to it.