A sign in C++ I've never seen before: |=

Question

I have some code here:

case MONITORTYPE_WUXGA_SXGA_WXGA:
    bResult |= (var == enum1);
    bResult |= (var == enum2);

Now i know what its doin

Answer 1

a |= b

is the same as

a = a | b

which is a bitwise OR operation.