Hello, I have a little problem with the *.ico format.
I read in the MSDN about this format but it doesn't explain well how dos the "AND" and "XOR" mask works. I now that its used to make the transparent aea , but don't now how.

Do you have a good link with the explanation. (couldn't find nothing in google) or now how does it work?

second link on google:

http://www.awitness.org/delphi_pascal_tutorial/source3/and_xor_icon.html

AND clears, while XOR only changes the bits that are set in the icon.

010101011111 <--- pretent screen
111000001011 <--- AND mask
010000001011 <--- intermediate result

000110010100 <--- XOR mask
010110011111 <--- final result

result = XOR(xmask,AND(amask,screen))