UnhookWindowsHookEx 失败!

Question

各位好！

我在Win7+VS2010环境下编写的一个程序，需要感应鼠标和键盘活动，之前用如下代码调用SetWindowsHookEx一直失败，

hMouseHook = SetWindowsHookEx( WH_MOUSE_LL, MouseHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0);

之后改用简化了的代码，成功了，具体如下：

hMouseHook = SetWindowsHookEx(WH_MOUSE_LL, MouseHookProcedure, IntPtr.Zero, 0);

但问题是UnhookWindowsHookEx发生异常。怪异的是，如果在程序启动时调用SetWindowsHookEx之后紧跟着UnhookWindowsHookEx，会返回true，表示unhook成功，但程序启动之后再关闭时，调用UnhookWindowsHookEx却返回false，但我检查了句柄数值正确，而且系统钩子也没有被释放过，且始终有效，谁知道问题出在什么地方啊？谢谢啦！

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I Believe, I Can

Answer 1

晕，

hMouseHook = SetWindowsHookEx( WH_MOUSE_LL, MouseHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0);

这段代码在XP上面是成功的，卸载系统钩子也是成功的，但在Win7下面就是不行！哪位大侠给点建议吧！

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I Believe, I Can

Answer 2

你好，

请问出错信息是什么，另外能否多提供一些相关的code

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Paul Zhou [MSFT]
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