Binary help

[Mast3rpyr0]

I am trying to create a program that will allow a user to select an image file and click a button and it will change the first 4 rows of its hex code(keys?) to null bytes and saving the old bytes in a file to add back later(which is the full function of the program, basically image encryption) e.g.

Would this be possible? i have gone through the help file and have only seen 2 hex functions and they dont seem to do anything i want to do.

Edited June 16, 2007 by Mast3rpyr0

[Mast3rpyr0]

ok i figured out a way that i can export a hexfile and edit it but now i need hex workshop to work with my program but not actually come up. any way i can do this or maybe another command line hex editor?

[Siao]

In AutoIt it's called Binary.

FileOpen with binary mode flag, then FileRead/FileWrite what you need...

[Mast3rpyr0]

ok that looks like it will work but i need it to write at the begin of the file. or another way i thought might work is actually splitting the file in half and storing it as 2 separate files and then put it back together much like winrar and splitting archives into 700MB parts. i would rather do this if possible