Listing 3. Cycle through the bitmap negating each pixel.

for(int row = 0;row < 330;row++){ for(int column = 0;column < 324;column++){ pixel = getpixel(picA,column,row); red = getr(pixel); green = getg(pixel); blue = getb(pixel); putpixel(picA,column,row,makecol( 255-red,255-green,255-blue)); }//end loop row }//end loop on column