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40 lines
2.2 KiB
40 lines
2.2 KiB
// This code is distributed under MIT license.
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// Copyright (c) 2015 George Mamaladze
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// See license.txt or http://opensource.org/licenses/mit-license.php
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using System;
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namespace Gma.System.MouseKeyHook.WinApi
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{
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/// <summary>
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/// The CallWndProc hook procedure is an application-defined or library-defined callback
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/// function used with the SetWindowsHookEx function. The HOOKPROC type defines a pointer
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/// to this callback function. CallWndProc is a placeholder for the application-defined
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/// or library-defined function name.
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/// </summary>
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/// <param name="nCode">
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/// [in] Specifies whether the hook procedure must process the message.
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/// If nCode is HC_ACTION, the hook procedure must process the message.
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/// If nCode is less than zero, the hook procedure must pass the message to the
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/// CallNextHookEx function without further processing and must return the
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/// value returned by CallNextHookEx.
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/// </param>
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/// <param name="wParam">
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/// [in] Specifies whether the message was sent by the current thread.
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/// If the message was sent by the current thread, it is nonzero; otherwise, it is zero.
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/// </param>
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/// <param name="lParam">
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/// [in] Pointer to a CWPSTRUCT structure that contains details about the message.
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/// </param>
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/// <returns>
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/// If nCode is less than zero, the hook procedure must return the value returned by CallNextHookEx.
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/// If nCode is greater than or equal to zero, it is highly recommended that you call CallNextHookEx
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/// and return the value it returns; otherwise, other applications that have installed WH_CALLWNDPROC
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/// hooks will not receive hook notifications and may behave incorrectly as a result. If the hook
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/// procedure does not call CallNextHookEx, the return value should be zero.
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/// </returns>
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/// <remarks>
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/// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/hooks/hookreference/hookfunctions/callwndproc.asp
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/// </remarks>
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public delegate IntPtr HookProcedure(int nCode, IntPtr wParam, IntPtr lParam);
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} |