GetEntryUsage
GetEntryUsage Access the usage and tolerance fields of one palette color
#include <Palettes.h> Palette Manager
void GetEntryUsage(srcPalette, srcEntry, &destUsage, &destTolerance);
PaletteHandle srcPalette; handle to the address of a source color palette
short srcEntry ; specific palette location of color being copied
short *destUsage ; usage value about to change for this palette entry
short *destTolerance ; value indicating tolerance level that's about to
change for this palette entry
GetEntryUsage lets your application open up a target color so it can be modified
by SetEntryUsage.
srcPalette is the palette containing the color values you want to copy.
srcEntry is the particular color whose values you want.
destUsage is pmCourteous, pmExplicit, pmTolerant, or pmAnimated
*destTolerance is the tolerance level of the color about to be changed.
Returns: none

Notes: GetEntryUsage does the preparation work in making new color qualities
available. Later, SetEntryUsage can come along and make the change.