It just basically means using bitmasks and shifts. Since shifts aren't possible in VB, you have to simulate them with division. This code will get you the red, green and blue parts from a 32-bit colour value:

Code:
Red = Colour And 255
Green = Colour \ 256 And 255
Blue = Colour \ 65536 And 255
If you wanted the alpha too, it would be (Colour \ 16777216 And 255).

In case you hadn't noticed:
256 = 2^8
65536 = 2^16
16777216 = 2^24