Break down word into 4 bytes using shift and mask

[CoDEFRo]

If I have a word: unsigned int x and I'd like to break it down into four bytes: unsigned char b1, b2, b3, b4, can someone tell me the proper syntax on how to do this. I know you have to shift and then mask, but am not sure how to go about doing it from a code perspective.

b1 = x //&& mask all but the lowest order byte
b2 = x >> 8 //&& mask all but the lowest order byte
b3 = x >> 16 //&& mask all but the lowest order byte
b4 = x >> 24//&& mask all but the lowest order byte

??

Thanks.