SetEntryColor
SetEntryColor Change the color of a palette entry from an application
#include <Palettes.h> Palette Manager
void SetEntryColor( destPalette, destEntry, srcRGB );
PaletteHandle destPalette; handle to the address of a destination color palette
short destEntry ; specific palette entry you're going to change
RGBColor srcRGB ; value of the new color to substitute for the old color
SetEntryColor lets your application change an individual target color in a
destination palette.
destPalette is the palette containing the color you want to change.
destEntry is the particular color you've targeted for change.
srcRGB is the specific RGB value of the new color about to be switched in
for the old.
Returns: none

Notes: SetEntryColor marks a change in a color palette from old to new color. As
yet, however, no visible change occurs in the color environment. That event
takes place at the next ActivatePalette call. The change comes quickly, though,
since a changed entry is marked as such and a palette update occurs even when
no other changes that would normally precipitate a color environment change
have taken place.