>>I am developing a app for many customs. Each time a make a little (or great) modification of it, must i send to all of them the entire new exe file? or ther's a way to update the existing one ?. Is very important cause the exe file could be higher than 3 Mbytes. Even if i use E-Mail to distribute it time is gold for me and for the others.
>
>You might consider using patch file generators such as .RTPatch (practically
>industry standard software update system used by MS, Borland, Novell among many
>others). The way it works is by comparing the newer version of the program
>against the older one and extracting detected changes into a separate patch file.
>You would send that patch file to your clients and it will auto-update all the
>altered files. We've been using it for a year now and I can only say good things
>about it. It's extremely configurable (you can include entire directory trees to
>be scanned for changed files and it will deliver all the updates for you at the
>client's site) The patch files are usually around 30K - the biggest one I ever got was about 90k.
>One caveat though: it cannot be used with Fox-'encrypted' files.
>
>You can quickly download an evaluation version from http://www.ptsdirect.co.uk/static/rtpatch.html
>
>Their homepage is at http://www.pocketsoft.com

That's exactly what i need. Thanks a lot