>I have an image. I want to show only some part of it. Tell me how to show it with passing cordinates.

What part? If you want just a rectangular area, you can create a container, put an image in the container, and set the image to show your picture. Then, if you want to show only the image from 10,10 to 20,20, you could set the top and left of the image to -10 and -10 and teh height and width of teh container to 10 and 10.