57 lines
1.9 KiB
C#
57 lines
1.9 KiB
C#
using System;
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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using HandyControl.Data;
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using HandyControl.Tools.Interop;
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namespace HandyControl.Tools
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{
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internal class KeyboardHook
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{
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public static event EventHandler<KeyboardHookEventArgs> KeyDown;
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public static event EventHandler<KeyboardHookEventArgs> KeyUp;
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private static IntPtr HookId = IntPtr.Zero;
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private static readonly UnsafeNativeMethods.HookProc Proc = HookCallback;
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public static void Start() => HookId = SetHook(Proc);
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public static void Stop() => UnsafeNativeMethods.UnhookWindowsHookEx(HookId);
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private static IntPtr SetHook(UnsafeNativeMethods.HookProc proc)
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{
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using (var curProcess = Process.GetCurrentProcess())
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using (var curModule = curProcess.MainModule)
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{
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if (curModule != null)
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{
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return UnsafeNativeMethods.SetWindowsHookEx((int)UnsafeNativeMethods.HookType.WH_KEYBOARD_LL, proc,
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UnsafeNativeMethods.GetModuleHandle(curModule.ModuleName), 0);
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}
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return IntPtr.Zero;
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}
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}
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private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
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{
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if (nCode >= 0)
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{
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if (wParam == (IntPtr)NativeMethods.WM_KEYDOWN)
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{
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var virtualKey = Marshal.ReadInt32(lParam);
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KeyDown?.Invoke(null, new KeyboardHookEventArgs(virtualKey));
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}
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else if (wParam == (IntPtr)NativeMethods.WM_KEYUP)
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{
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var virtualKey = Marshal.ReadInt32(lParam);
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KeyUp?.Invoke(null, new KeyboardHookEventArgs(virtualKey));
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}
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}
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return UnsafeNativeMethods.CallNextHookEx(HookId, nCode, wParam, lParam);
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}
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}
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} |