That's a fine and dandy code snippet.

Unfortunately, it doesn't seem to have anything to do with the compilation issue you're having... ?

the problem was when im trying to include a file with the cipher in a text file instead of using a binary one, the file is too big and compiler complain. For example, the text file looked like this:

BYTE MyCipher[CIPHER_LENGTH] = {
0x8D, 0x97, 0xD2, 0x83, 0xCD, 0x8F, 0xC0, 0xF9, 0x6C, 0xD5, 0xFE, 0x1F, 0x34, 0xD6, 0x11, 0x3A,
0xCE, 0x9C, 0xEC, 0xF2, 0xB5, 0x52, 0x20, 0x77, 0x63, 0xA1, 0x62, 0x90, 0x1A, 0x9F, 0x7F, 0xA9,
0x6A, 0xC5, 0x30, 0x26, 0x81, 0x43, 0xAD, 0xA5, 0xBA, 0x7B, 0x92, 0x1B, 0x3A, 0xEB, 0x48, 0x99,
// ... and so on

i extracted this using the "Copy as Text" from an hexEditor, but the file make almost 4mo in text mode, instead of 512k in binary, i think that's why the compiler is complaining. What im trying to do is to get rid of the binary file and embeed the data into the executable itself. I think i should try using a ressource file instead.

Yeah, sounds like a prime candidate for a resource :-)

Given your requirements, a much smaller key will probably be as secure and less hassle.