Crop/Cut Images function or dll

I am looking for a function or a DLL that will crop or cut jpg, gif, and png formats. This function or DLL will be called from an asp.net web application. I am not interested in anything that will just resize the original image into a Thumbnail image. Lets say the original image is 50 x 200 pixels, the dll/function should take this image and cut the image from the top-left conner and create a smaller image in the size of, lets say 50 x 75 pixels. (125 pixels from bottom of the original image should not be visible on the new image) Again, i am not interested in image resizing where the whole image is resized into something smaller. If you have functions that can sharpen and compress the images, its a plus. ## Deliverables 1) complete source code of all work done. 2) Exclusive and complete copyrights to all work purchased. (No GPL, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site). ## Platform windows xp, windows 2000, windows 2003