feature_textbackground - textbackground supported?

Description

feature_textbackground can be used to determine if the current platform supports the built-in procedure textbackground.

Example

program color(output);
const
   blue = 1;
   white = 15;
begin
   if supported(feature_textbackground) then textbackground(blue);
   if supported(feature_textcolor) then textcolor(white);
   writeln('white on blue');
end.

Portability

Operating Systems: All
Standard Pascal: No