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    <p>For your original question, here it goes.</p> <p>Capturing an inactive window in Windows is pretty straightforward, using the robot class, ONLY and ONLY if the window is visible at the moment of capturing. <strong>If you want to avoid that requirement, you HAVE to use the DWM API.</strong></p> <p>Using the normal Windows API (pre Vista), you can use GetWindowRect(handle,RECT) where handle is a handler to the window you want to capture. This will get you a RECT object (I assume you are using JNA), here is the sequence of code you should write:</p> <pre><code>RECT dimensionsOfWindow = new RECT(); GetWindowRect( handlerToWindow, dimensionsOfWindow );//now in the dimensionsOfWindow you have the dimensions Robot robot = new Robot(); BufferedImage img = robot.createScreenCapture( dimensionsOfWindow.toRectangle() );//now in the img object you have only the image of your desired window </code></pre> <p>However!! This will work as a charm ONLY if your window is currently visible. If it is minimized, you will get some exception in java (because it has negative x and y ). And if it is partially hidden, you will also screenshot the other windows that are on top of it.</p> <p>You can't solve your problem on boxes that don't have dwm (Desktop Windows Manager) as it has an API that allows different windows to write to a temp buffer before they actually are painted to the screen. </p> <p>On XP and non - running DWM machines, however, you are stuck with the code I gave you.</p> <p>Additionally , you can take a look at the following question: <a href="http://bartdesmet.net/blogs/bart/archive/2006/10/05/4495.aspx" rel="nofollow" title="Guide">link text</a></p> <p><strong>Edit:</strong></p> <p>Here is an interesting guide (in C#, though, but you can use JNA+Java applying the same principles) that will give you a better understanding of the DWM and how to use it to do EXACTLY what you want.</p> <p><a href="http://bartdesmet.net/blogs/bart/archive/2006/10/05/4495.aspx" rel="nofollow" title="Guide">link text</a></p> <p><strong>EditEdit</strong> Just saw you have a link to the same guide in C# that I gave you. What seems to be the problem in just rewriting the code for Java/JNA?</p> <p><strong>EditEditEdit</strong> To answer your additional question (how to convert your BitBit to a BufferedImage ), here is a guy who did it in his Open Source project. It is a nice piece of work and give him some appreciation:</p> <p><a href="http://code.google.com/p/jmemoryeditorw/" rel="nofollow">http://code.google.com/p/jmemoryeditorw/</a></p> <p>You might notice that if you run the program, it will give you all the processes and also...their Icons. <strong>If you dig in the code, you will see how they are converted from BitBit to BufferedImages.</strong></p> <p>Cheers and I have to say, a very nice question.</p>
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    1. COthanks very much baba!! this link ([http://code.google.com/p/jmemoryeditorw/][1]) looks really promising! Will let you know how I go in a few days. Thanks again! [1]: http://code.google.com/p/jmemoryeditorw/
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