MASK             Return a Bit Mask                              MASM Operator

  MASK recordFieldName
or
MASK record

Returns a bit pattern representing the bits used by a particular field
of a record.  Bits used by the field will by 1, while those not used
by the field will be 0.

Notes:     The recordFieldName must be the name of a record field.
Record  must be the name of a record.

See also: WIDTH

MASK Return a Bit Mask