bCombine
A flag which tells how to color the output pixels. Possible values are:
| 
 Value  | 
 Meaning  | 
| 
 TRUE  | 
 Pixels with values greater than or equal to the threshold value are ANDed with crColor. The source pixel is first converted to 24-bit grayscale and then And-ed with crColor.  | 
| 
 
  | 
 For pixels with values less than the threshold value, the RGB pixel value will be the same as the high byte source pixel value. That is R = G = B = High byte values of the source pixel.  | 
| 
 FALSE  | 
 Pixels with values greater than or equal to the threshold value are set to crColor. Pixels with values less than the threshold value are set to black.  |