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This is a small program that can extract email addresses
from files that are not necessarily text files.
The program works by opening the input file as a binary
file. If an '@' sign is found in the file, the program
"backs up" in the file to find the first character that
could not be a valid email character.
Then, the email address is collected and stored in an
array which is placed in memory. This process continues
until the end of file is reached.
When the entire input file is read, the addresses are
sorted in alphabetical order, and duplicate addresses
are removed. Email addresses that are found in the file
are shown in an edit box.
Additionally, a text file containing the same list
is created (called emails.txt) in the root directory.
All enhancements and modifications are left to the
creativity and imagination of the progrmamer.
Note: This program demonstrates the use of a very
efficient sort algorithm. Also, this program shows
beginning programmers how to allocate and free memory.
Other items of potential interest show file positioning
and removal of duplicate entries.
12 Aug 2001 - I incorporated a suggestion
from a codeproject member, fixed a few bugs, and then made
many improvements to the program. The program now
can collect up to 250,000 email addresses per file.