textbackground

 void textbackground(int color);

change of current background color in text mode

#include<stdio.h>
#include<conio.h>
 
int main( void )
{
   textbackground(RED);
 
   cprintf("and the answer is 42 with a red background.");
 
   getch();
   return 0;
}

  and the answer is 42 with a red background