setbkcolor

#include<graphics.h>
#include<conio.h>
 
main()
{
   int gd = DETECT, gm;
   initgraph(&gd, &gm, "C:\\TC\\BGI");
 
   outtext("Press any key to change the background color to GREEN.");
   getch();
 
   setbkcolor(GREEN);
 
   getch();
   closegraph();
   return 0;
}