The bit pattern for a block of black pixels (type CFData. If this key is absent, black is assumed to be all zeros. If present, this should be bitsPerPixel bits long; if bitsPerPixel is less than a byte, repeat the bit pattern for the full byte.
Available in Mac OS X v10.6 and later.
Declaration Syntax Version Information- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later)