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CC-Functions/W32/Hooks/MouseHook.cs

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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
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using System.Runtime.InteropServices;
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namespace CC_Functions.W32.Hooks
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{
public sealed class MouseHook : IDisposable
{
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public delegate void MouseEvent(MouseHookEventArgs args);
public enum MouseMessages
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{
WM_LBUTTONDOWN = 0x0201,
WM_LBUTTONUP = 0x0202,
WM_MOUSEMOVE = 0x0200,
WM_MOUSEWHEEL = 0x020A,
WM_RBUTTONDOWN = 0x0204,
WM_RBUTTONUP = 0x0205
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}
private const int WH_MOUSE_LL = 14;
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private static readonly List<MouseHook> Instances = new List<MouseHook>();
private static readonly LowLevelMouseProc Proc = HookCallback;
private static IntPtr _hookID = IntPtr.Zero;
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public MouseHook()
{
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if (Instances.Count == 0)
_hookID = SetHook(Proc);
Instances.Add(this);
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}
public void Dispose()
{
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Instances.Remove(this);
if (Instances.Count == 0)
UnhookWindowsHookEx(_hookID);
}
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public event MouseEvent OnMouse;
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private static IntPtr SetHook(LowLevelMouseProc proc)
{
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using (Process curProcess = Process.GetCurrentProcess())
using (ProcessModule curModule = curProcess.MainModule)
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{
return SetWindowsHookEx(WH_MOUSE_LL, proc, GetModuleHandle(curModule.ModuleName), 0);
}
}
private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
{
if (nCode >= 0)
{
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MSLLHOOKSTRUCT hookStruct = (MSLLHOOKSTRUCT) Marshal.PtrToStructure(lParam, typeof(MSLLHOOKSTRUCT));
for (int i = 0; i < Instances.Count; i++)
Instances[i].OnMouse?.Invoke(new MouseHookEventArgs(new Point(hookStruct.pt.x, hookStruct.pt.y),
(MouseMessages) wParam));
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}
return CallNextHookEx(_hookID, nCode, wParam, lParam);
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}
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr SetWindowsHookEx(int idHook, LowLevelMouseProc lpfn, IntPtr hMod, uint dwThreadId);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool UnhookWindowsHookEx(IntPtr hhk);
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);
[DllImport("kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
private static extern IntPtr GetModuleHandle(string lpModuleName);
private delegate IntPtr LowLevelMouseProc(int nCode, IntPtr wParam, IntPtr lParam);
[StructLayout(LayoutKind.Sequential)]
private struct POINT
{
public readonly int x;
public readonly int y;
}
[StructLayout(LayoutKind.Sequential)]
private struct MSLLHOOKSTRUCT
{
public readonly POINT pt;
public readonly uint mouseData;
public readonly uint flags;
public readonly uint time;
public readonly IntPtr dwExtraInfo;
}
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}
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}