Screen capturing inactive window

Is it possible to get image contents of an obstructed window without bringing it to the front? Also, is it possible to send mouse clicks to a specific location开发者_如何学编程s of such window? I want to do this in Java, using JNA, running Windows XP (if it is possible, would it also work on Windows 7?). If that can be done, would you mind telling me what functions will be needed and where can I read about it, because I have never worked with JNA yet. Thank you.