application for take image of an active program

I need someone develop application for me as describe bellow: - Purpose of application is to take image of screen. - It has to run on background. - It has configuration function for specified application to take image. That mean only application is selected will be taken image. - Application take image as actions from user actions and application actions. That means with the user action: +Every actions from window user like (click mouse, input from keyboard, touch screen (with hardware support touch screen) will inform for the application to take the active window of specification application image. + Every actions of specified application actions like open new window will inform for the application to take the active window of specification application image. - Compatible with window xp, window vista, win7 (win8, ubuntu for the next step of project) - Running smoothly with low hardware requirement. - Java is my prefer but other language is ok. Feel free when ask me the question, I will only work with someone understand my requirement.