在滾輪輸入上執行鼠標左鍵單擊

Question

基本上，我想創建一個C＃應用程序（我正在使用在Visual Studio中打開的標准WPF項目），該應用程序可以檢測用戶何時向上或向下滾動鼠標滾輪，並在當前鼠標上觸發鼠標點擊屏幕位置。

我想要的程序的偽代碼是

While the program is running
 If the program detects a mouse scroll wheel up or scroll wheel down from the user
    Perform a Single Left Click at the current mouse screen position
 End If
End While

我不知道如何檢測鼠標滾輪。 我在WPF應用程序中使用C＃，我已經成功地能夠移動鼠標光標並使用以下代碼執行左鍵單擊，但是我在弄清楚如何偵聽鼠標滾輪輸入並執行將要執行的功能時遇到了麻煩收到輸入后發送鼠標左鍵。 即使應用程序沒有焦點，它也需要工作，因為鼠標單擊會發送到另一個應用程序。 誰能指出正確的方向，指示我需要去哪里進行這項工作。

謝謝。 當前代碼如下。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace Clicky_Clicky
{
    public partial class MainWindow : Window
    {
        [System.Runtime.InteropServices.DllImport("user32.dll")]
        public static extern void mouse_event(int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo);
        [System.Runtime.InteropServices.DllImport("user32.dll")]
        static extern bool SetCursorPos(int X, int Y);

        public const int MOUSEEVENTF_LEFTDOWN = 0x02;
        public const int MOUSEEVENTF_LEFTUP = 0x04;
        public const int MOUSEEVENTF_RIGHTDOWN = 0x08;
        public const int MOUSEEVENTF_RIGHTUP = 0x10;
        public const int WM_MOUSEWHEEL = 0x020A;

        public void MouseClick(int x, int y)
        {
            mouse_event(MOUSEEVENTF_LEFTDOWN, x, y, 0, 0);
            mouse_event(MOUSEEVENTF_LEFTUP, x, y, 0, 0);
        }

        public MainWindow()
        {
            int x = 1400;//Set Mouse Pos X
            int y = 340;//Set Mouse Pos  Y
            InitializeComponent();
            SetCursorPos(x, y); //Move Mouse to position on screen designated by X and Y

            MouseClick(x, y); //Perform a mouse click (mouse event down, mouse event up)

        }
    }
}

編輯：經過更多的研究，看來我想要的東西是鼠標的全局鈎子，但我仍然找不到能夠獲得想要的簡單方法。

Answer 1

我可以使用我想做的事情得到一個非常簡單的答案

http://blogs.msdn.com/b/toub/archive/2006/05/03/589468.aspx

源代碼：

using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace Clicky_Clicky
{
    public partial class MainWindow : Window
    {
        private static LowLevelMouseProc _proc = HookCallback;
        private static IntPtr _hookID = IntPtr.Zero;


        [System.Runtime.InteropServices.DllImport("user32.dll")]
        public static extern void mouse_event(int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo);

        public MainWindow()
        {
            int x = 1400;//Set Mouse Pos X
            int y = 340;//Set Mouse Pos  Y
            InitializeComponent();
            _hookID = SetHook(_proc);
        }

        public const int MOUSEEVENTF_LEFTDOWN = 0x02;
        public const int MOUSEEVENTF_LEFTUP = 0x04;

        private static IntPtr SetHook(LowLevelMouseProc proc)
        {
            using (Process curProcess = Process.GetCurrentProcess())
            using (ProcessModule curModule = curProcess.MainModule)
            {
                return SetWindowsHookEx(WH_MOUSE_LL, proc,
                    GetModuleHandle(curModule.ModuleName), 0);
            }
        }

        private delegate IntPtr LowLevelMouseProc(int nCode, IntPtr wParam, IntPtr lParam);

        public static void MouseClick(int x, int y)
        {
            mouse_event(MOUSEEVENTF_LEFTDOWN, x, y, 0, 0);
            System.Threading.Thread.Sleep(33);
            mouse_event(MOUSEEVENTF_LEFTUP, x, y, 0, 0);
        }

        private static IntPtr HookCallback(
            int nCode, IntPtr wParam, IntPtr lParam)
        {
            if (nCode >= 0 &&
                MouseMessages.WM_MOUSEWHEEL == (MouseMessages)wParam)
            {
                MSLLHOOKSTRUCT hookStruct = (MSLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(MSLLHOOKSTRUCT));
                Console.WriteLine(hookStruct.pt.x + ", " + hookStruct.pt.y);
                MouseClick(hookStruct.pt.x, hookStruct.pt.y);
            }
            return CallNextHookEx(_hookID, nCode, wParam, lParam);
        }

        private const int WH_MOUSE_LL = 14;

        private enum MouseMessages
        {
            WM_LBUTTONDOWN = 0x0201,
            WM_LBUTTONUP = 0x0202,
            WM_MOUSEMOVE = 0x0200,
            WM_MOUSEWHEEL = 0x020A,
            WM_RBUTTONDOWN = 0x0204,
            WM_RBUTTONUP = 0x0205
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct POINT
        {
            public int x;
            public int y;
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct MSLLHOOKSTRUCT
        {
            public POINT pt;
            public uint mouseData;
            public uint flags;
            public uint time;
            public IntPtr dwExtraInfo;
        }

        [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.Auto, SetLastError = true)]
        private static extern IntPtr GetModuleHandle(string lpModuleName);

    }

}