Get the numeric value for a color

BUTTONFACE = 78682240
WINDOW_BACKGROUND = 1087434968
WINDOW_TEXT = 33554592
APPLICATION_WORKSPACE = 268435456
TRANSPARENT = 553648127
BLACK = RGB(0, 0, 0)
WHITE = RGB(255, 255, 255)
LIGHT_GRAY = RGB(192, 192, 192)
DARK_GRAY = RGB(128, 128, 128)
RED = RGB(255, 0, 0)
DARK_RED = RGB(128, 0, 0)
GREEN = RGB(0, 255, 0)
DARK_GREEN = RGB(0, 128, 0)
BLUE = RGB(0, 0, 255)
DARK_BLUE = RGB(0, 0, 128)
MAGENTA = RGB(255, 0, 255)
DARK_MAGENTA = RGB(128, 0, 128)
CYAN = RGB(0, 255, 255)
DARK_CYAN = RGB(0, 128, 128)
YELLOW = RGB(255, 255, 0)
BROWN = RGB(128, 128, 0)
These values are hard-coded, if you need more flexibilty, you can query Windows to dynamically get the current color setting.
[External function declaration]
FUNCTION unsignedlong GetSysColor(int nIndex) LIBRARY "user32.dll"
using the following parameters :
COLOR_SCROLLBAR 0
COLOR_BACKGROUND 1
COLOR_ACTIVECAPTION 2
COLOR_INACTIVECAPTION 3
COLOR_MENU 4
COLOR_WINDOW 5
COLOR_WINDOWFRAME 6
COLOR_MENUTEXT 7
COLOR_WINDOWTEXT 8
COLOR_CAPTIONTEXT 9
COLOR_ACTIVEBORDER 10
COLOR_INACTIVEBORDER 11
COLOR_APPWORKSPACE 12
COLOR_HIGHLIGHT 13
CLOR_HIGHLIGHTTEXT 14
COLOR_BTNFACE 15
COLOR_BTNSHADOW 16
COLOR_GRAYTEXT 17
COLOR_BTNTEXT 18
COLOR_INACTIVECAPTIONTEXT 19
COLOR_BTNHIGHLIGHT 20
// (WINVER >= 0x0400)
COLOR_3DDKSHADOW 21
COLOR_3DLIGHT 22
COLOR_INFOTEXT 23
COLOR_INFOBK 24
COLOR_DESKTOP COLOR_BACKGROUND
COLOR_3DFACE COLOR_BTNFACE
COLOR_3DSHADOW COLOR_BTNSHADOW
CLOR_3DHIGHLIGHT COLOR_BTNHIGHLIGHT
COLOR_3DHILIGHT COLOR_BTNHIGHLIGHT
COLOR_BTNHILIGHT COLOR_BTNHIGHLIGHT