GetEntryColor
GetEntryColor Access a palette entry from an application
#include <Palettes.h> Palette Manager
void GetEntryColor( srcPalette, scrEntry, &destRGB );
PaletteHandle srcPalette; handle to the address of a source color palette
short srcEntry ; specific palette entry location holding a new color
RGBColor *destRGB ; value of current color being targeted for change
GetEntryColor lets your application open up a particular color in a source
palette so the SetEntryColor procedure can use it to make a change to a window
color.
srcPalette is the palette with colors you can use for making a change.
srcEntry is the particular color you've chosen to substitute for the old
color.
*destRGB is the specified RGB value of the old color about to be changed.
Returns: none

Notes: GetEntryColor does the preparation work in making a new color available.
Later, SetEntryColor can come along and make the change.