One of the parameters in the BitBlt function determines how
the 2 images will be combine togather, one of the options is
doing and 'AND' between the source and the destination Bitmaps,
what does it mean exactly? i mean, i know how to do AND between
only 2 values 0, 1, but i don't understand what it's mean to do
'AND' between clBlue and clGreen for example. does it mean that
it's doing 'AND' between the Binary values of each pixel color?