I saw 0xB6DB6DB6 used as a mask here.
If I am not wrong, then thats the representation of number in hexadecimal system. I remember coming across them when I was modding some old games for fun.
0x prefix is used to make the compiler aware that you are using a hexadecimal number which is followed by number in hexadecimal format .
You can checkout this link :
http://wiki.osdev.org/Hexadecimal_Notation
Dear, dont use award point feature. Instead, click on the “tick-in circle” and accept the relevant answers to award points to the answerer. Thats the traditional way 