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POLow level mouse hook and DirectX
 

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    <p>I'm building an application which needs to filter some mouse clicks system-wide. That is, I need to make the system ignore some mouse button clicks at special occasions.</p> <p>I use low level mouse hook and <code>SetWindowsHookEx</code> to filter out these clicks. It works relatively well, except for <code>WPF</code> applications. I guess that's because these applications use <code>DirectX</code> and <code>DirectInput</code> for input processing, and that's why I can't filter out clicks in these applications, since they get the input directly from the driver.</p> <p>Is there any way how to filter clicks in <code>WPF</code>/<code>DirectX</code> applications?</p> <p>I know it is generally not good idea to globally filter clicks, but it is crucial for my application, and I will make sure that it is not filtered in games and other programs. But <code>WPF</code> applications have ordinary <code>GUI</code>, so I need to filter clicks in them as well.</p> <h2>Update</h2> <p>I guess I could solve this problem by writing my own filtering driver, but since I don't have any experience in writing drivers, please let me know if there is any other solution.</p> <h2>API Hooking Resources</h2> <p>I've found some helpful links regarding API hooking. Use this as a reference.</p> <p><a href="http://web.archive.org/web/20040426083909/29a.host.sk/29a-7/Articles/29A-7.019" rel="nofollow noreferrer">Hooking Windows API</a><br> <a href="http://www.codeproject.com/KB/system/hooksys.aspx" rel="nofollow noreferrer">API hooking revealed</a><br> <a href="http://www.codeproject.com/KB/system/APIHookingPart2.aspx" rel="nofollow noreferrer">API hooking revealed Part 2</a><br> <a href="http://www.codeguru.com/Cpp/W-P/dll/hooking/article.php/c3639" rel="nofollow noreferrer">Hijack Textout Calls From Notepad</a><br> <a href="http://help.madshi.net/madCodeHook.htm" rel="nofollow noreferrer">madCodeHook</a><br> <a href="http://sandsprite.com/CodeStuff/IAT_Hooking.html" rel="nofollow noreferrer">IAT Function Hooking</a></p> <h1>FINAL SOLUTION</h1> <p><a href="https://stackoverflow.com/questions/5036143/what-does-wpf-use-to-capture-mouse-and-keyboard-input">WPF does not use DirectInput, but standard Win32 messages for input handling</a> (except for stylus, which is the source for all problems for me, because I use stylus for development, and I wasn't aware WPF apps are stylus-aware). However for filtering clicks in apps that use DirectInput, one would have to hook API, as the accepted answer explains.</p>
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