How to Convert a RGBCOMP() Value into Component Values

ID: Q149184

3.00 3.00b WINDOWS

 kbhowto

The information in this article applies to:

Microsoft Visual FoxPro for Windows, versions 3.0, 3.0b

SUMMARY

The RGBCOMP() function is new to Foxtools.fll. It accepts an RGB composite value as an argument and converts it to the three component values for you. In effect, it is the counterpart to FoxPro's RGB() function.

MORE INFORMATION

RGBComp() returns the Red, Green, and Blue components of a composite RGB color value. The syntax is:

   RGBComp( nRGBColor, @nRedVal, @nGreenVal, @nBlueVal )

Parameters:

nRGBColor is a composite RGB color value ranging from 0 to 16777215.
nRedVal, upon return, is the intensity of the red color component of nRGBColor.
nGreenVal, upon return, is the intensity of the green color component of nRGBColor.
nBlueVal, upon return, is the intensity of the blue color component of nRGBColor.

Sample Code

The following code gives an example implementation:

*-- Set up to use FoxTools.FLL

     CLEAR
     SET LIBRARY TO SYS(2004) + '\FOXTOOLS'

*-- Declare some variables to be used in the function calls

     nRedVal = 0
     nBlueVal = 0
     nGreenVal = 0

*-- Display as we go.

     ? RGBCOMP(65537, @nRedVal, @nGreenVal, @nBlueVal)
     ? nRedVal, nGreenVal, nBlueVal

     = RGBCOMP(65537 + 44 + 256 * 4, @nRedVal, @nGreenVal, @nBlueVal)
     ? nRedVal, nGreenVal, nBlueVal

     = RGBCOMP(65537 + 86 + 256 * 4, @nRedVal, @nGreenVal, @nBlueVal)
     ? nRedVal, nGreenVal, nBlueVal

*-- Reset the current active library.

     SET LIBRARY TO

Additional reference words: 3.00 3.00b VFoxWin KBCategory: kbhowto KBSubcategory: FxprgFoxtools

Keywords          : kbcode FxprgFoxtools 
Version           : 3.00 3.00b
Platform          : WINDOWS