Fais,
A 32-bit RGB has an additional Alpha factor in the high byte. To just have a 24-bit RGB, just AND the high byte of the 32-bit number with 0x00 and then you have your 24-bit number inside of a 32-bit shell. This is how LabVIEW stores 24-bit colors.
Here is a strong note: LabVIEW stores RGB as 0x00RRGGBB. Windows stores its COLORREF type as 0x00BBGGRR. If you need your LabVIEW color data to be used by Windows color functions, then you will need to do some byte swapping on the colors first.
Randy Hoskin
Applications Engineer
National Instruemnts
http://www.ni.com/ask
