CRC or Hash Checking?

[LaraSoft]

Just a quick question. I was wondering what's the easiest way to carry out a check on a file to see if it's been modified since I compiled it? Could I not carry out a check on the file size when I've compiled it, add these values to a CCN file and attach it to updates that I push out (ive devised an update system which will accomodate this) so when the user runs it on their end, my core could call this file and check its stored value against itself?

... or am I going waaaay too complicated for this? :P

Basically I want my application to be able to check itself to see if was modified in any way unofficially. If so it would fail to go any further and allow me to introduce another idea of mine

Thanks everyone in advance.

[James]

Store the CRC and check it using the CRC32 object.

[LaraSoft]

Thank you for that I have all that I need to write this now. Thnaks again.