To see how to use Read/Write cells, see a later section. Use
Read Only
cells if at all possible.
Status XAllocColor(display,cmap,screen_def) XColor *screen_def; /* supplies RGB values. RETURNS pixel value closest to the RGB specified and the RGB values actually used */ Status XAllocNamedColor(display,cmap,colorname,screen_def,exact_def); char *colorname; /* supplies name of color */ XColor *screen_def; /* RETURNS the values actually used in the colormap */ XColor *exact_def; /* RETURNS the closest color provided by the hardware*/