File-load filter

[Guest_imported]

Before I have my application load a file (eg.: .JPG file)
I want to check if the file hasnt been replaced by antother file and then renamed into the original file's name.
The Idea is to make a checksum on the data in this file.

Does anybody here have an idea to realise this?

Thanx in advance!

 

[Thei]

Hey Tiger245,

You might want to put the image(s) into a DLL-file. This way nobody can replace/alter the jpg-file(s).

 

[THOMASNG]

If you wish to prevent users from altering or erasing
a file, you can also via WINDOWS. To do this, use START|FIND
to locate your file, click on the icon, then hit FILE|PROPERTIES and click in the "Read Only" box.
A better way is to save the data to a backup disk.

 

[Guest_imported]

Thanx for the help but I think I descriped my problem a little bit wrong.

I have an application.. An own made picture edditor.
No I want to sell this application as a demo version.
So I have a couple of prechoosen pictures that the user can edit. But he is not allowed to replace the images with his own because that way it wouldnt be a demo anymore.
No I thought of making a check on the picture file before the application starts..
on form load --> open picturex.jpg --> check data by comparing this with the original checksum.
If picturex.jpg.checksum = original cecksum
ckecked = true!!
Get the idea a little bit?

Any suggestions are welcome!

Thanx in advance!

 

[CCLINT]

Why not just check the file Date and Time (use FSO - Microsoft Scripting Runtime)?

Or stick the pictures into a resource file, bypassing the normal loading method, and load them from there in the DEMO version.