333068bb_Structure_BITMAPINFOHEADER__2
[0] biPlanes [1] WORD [2] 
Specifies the number of color planes on the target device. In most cases this value must be set to 1. DaVinci extension: For 48-bit DIBs (bitmaps with 16 bits per color value of resolution), biPlanes should be set to 2.
Structure BITMAPINFOHEADER
2