hai , I am using the code <?php Header("Content-type: image/gif"); $image = ImageCreate(100,50); $black = ImageColorAllocate($image,0,0,0); $white = ImageColorAllocate($image,255,255,255); ImageArc($image,50,25,48,0,$white); ImageGif($image); Imagedestroy($image); ?> to display an image but the code is not working. how shud the code be and do i need to enable any libraries to do this. i have to get an image and get the midpoint(xy coordinate) of that image . how do i do that. if i run the above code i won't get any error but nothing will be displayed. how do i do this. Arun