cbb

    OpenVMS usage address
    type          CBB structure
    access        read/write
    mechanism     by reference
    The address of the CBB structure to be modified.

 bit

    OpenVMS usage longword
    type          longword (unsigned)
    access        read only
    mechanism     by value
    The bit in the CBB to be cleared. If the bit number is -1, clears
    all bits.