[Dev-C++] help on app to add to explorer context menu.

Dear all:

I'm new to c++ and Dev-cpp, although I have some basics on C and Pascal =
from
college classes (which I don't remember) and I currently do web =
programming
(PHP/MySql).

I'm trying to build a small app in c++ to "backup" files and folders. =
All it
does is to copy the original file(s) or folder(s) to the same location =
and
changing the copied filename to "original_name bk
todays_datetime.original_extension".

For example, if I right-click the file index.php in explorer and select
"Backup This File" it creates a copy of the file named
index_bk_20061122172201.php in the same folder.

I have already accomplished similar with a batch file and a vbs file, =
but it
opens a cmd window, vbs files don't get along well with anti-virus apps, =
and
I don't know how to add the context option to all files and folders =
(except
manually).

This is probably simple to do in c++. My problem is: Where do I start ? =
:)
Tips, links, books, googles, would be much appreciated, or if you know =
an
app that does the job please let me know.

TIA.

Pedro.