#include <graphics.h> void setfillstyle(int pattern, int color);
If invalid input is passed to setfillstyle, graphresult returns -1(grError), and the current fill pattern and fill color remain unchanged.
Note: The EMPTY_FILL style is like a solid fill using the current background color (which is set by setbkcolor).
![[WIN]](win.gif)
/* setfillstyle example */ 
#include <graphics.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <conio.h>
/* the names of the fill styles supported */
char *fname[] = { "EMPTY_FILL", "SOLID_FILL", "LINE_FILL", "LTSLASH_FILL", "SLASH_FILL", "BKSLASH_FILL", "LTBKSLASH_FILL", "HATCH_FILL", "XHATCH_FILL", "INTERLEAVE_FILL", "WIDE_DOT_FILL", "CLOSE_DOT_FILL", "USER_FILL" };
int main(void)
{
   /* request autodetection */
   int gdriver = DETECT, gmode, errorcode;
   int style, midx, midy;
   char stylestr[40];
   /* initialize graphics and local variables */
   initgraph(&gdriver, &gmode, "");
   /* read result of initialization */
   errorcode = graphresult();
   if (errorcode != grOk) {  /* an error occurred */
      printf("Graphics error: %s\n", grapherrormsg(errorcode));
      printf("Press any key to halt:");
      getch();
      exit(1);               /* terminate with an error code */
   }
   midx = getmaxx() / 2;
   midy = getmaxy() / 2;
   for (style = EMPTY_FILL; style < USER_FILL; style++) {
      /* select the fill style */
      setfillstyle(style, getmaxcolor());
      /* convert style into a string */
      strcpy(stylestr, fname[style]);
      /* fill a bar */
      bar3d(0, 0, midx-10, midy, 0, 0);
      /* output a message */
      outtextxy(midx, midy, stylestr);
      /* wait for a key */
      getch();
      cleardevice();
   }
   /* clean up */
   getch();
   closegraph();
   return 0;
}