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我正在使用 Windows 窗体 (C#) 开发应用程序。我需要能够按下一个按钮，该按钮开始监视另一个应用程序中下一次鼠标单击的位置。然后需要使用此单击的坐标来强制稍后在同一应用程序中单击同一按钮。为了进行测试，我只是使用计算器并按下一个键来捕获 X 和 Y，然后按下另一个按钮再次按下该键，但它不起作用。任何帮助找出我做错了什么将不胜感激。

我已经使用 MouseKeyHook 订阅了鼠标钩子

 nuget install MouseKeyHook

    public partial class Form1 : Form
    {
        [DllImport("user32.dll")]
        static extern bool GetCursorPos(out Point lpPoint);

        [DllImport("user32.dll")]
        static extern IntPtr WindowFromPoint(System.Drawing.Point p);

        [DllImport("user32.dll")]
        static extern bool PostMessage(IntPtr hWnd, uint Msg, int wParam, int lParam);

        [DllImport("user32.dll", SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        static extern bool GetWindowRect(IntPtr hWnd, ref RECT lpRect);
        [StructLayout(LayoutKind.Sequential)]
        [DllImport("user32.dll")]
        public static extern int SendMessage(IntPtr hWnd, int wMsg, IntPtr wParam, IntPtr lParam);

        const int WM_LBUTTONDOWN = 0x0201;

        private struct RECT
        {
            public int Left;
            public int Top;
            public int Right;
            public int Bottom;
        }

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

//Button click which starts the subscribe
        private void btnStart_Click(object sender, EventArgs e)
        {
            Subscribe();

        }

        private IKeyboardMouseEvents m_GlobalHook;
public void Subscribe()
        {
            // Note: for the application hook, use the Hook.AppEvents() instead
            m_GlobalHook = Hook.GlobalEvents();

            m_GlobalHook.MouseDownExt += GlobalHookMouseDownExt;
        }

        Point p;
        IntPtr hWnd;
        private void GlobalHookMouseDownExt(object sender, MouseEventExtArgs e)
        {

            if (GetCursorPos(out p))
            {
               IntPtr mainWindow = WindowFromPoint(p);
                hWnd = ChildWindowFromPointEx(mainWindow, p, 0x0000);

                RECT rct = new RECT();
                GetWindowRect(mainWindow, ref rct);
                X = p.X - rct.Left;
                Y = p.Y - rct.Top;
            }

            Unsubscribe();
        }

        public void Unsubscribe()
        {
            m_GlobalHook.MouseDownExt -= GlobalHookMouseDownExt;
            m_GlobalHook.Dispose();
        }


        
        private void btnClick_Click(object sender, EventArgs e)
        {
            PostMessage(hWnd, WM_LBUTTONDOWN,X, Y);
            
        }
   }
```.
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1 回答 1

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您不能保证其他应用程序（计算器）会响应您发布的消息。

另外，计算器是一个 UWP 窗口，你会得到一个空hWnd的ChildWindowFromPointEx. 您应该使用SendInput模拟鼠标输入并确保点击的地方没有被其他窗口覆盖。C# 示例：https ://stackoverflow.com/a/54072028/10611792

或者使用UI 自动化。

于 2020-09-21T10:08:16.773 回答