发送鼠标点击

Question

我正在尝试通过 sendmessage 在不使用鼠标的情况下模拟鼠标点击 不知何故它不起作用，但没有错误显示。 这是我的新代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Input;
using System.Diagnostics;


namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        private const int BM_CLICK = 0x00F5;

        [DllImport("user32.dll", SetLastError = true)]
        static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
        static extern IntPtr FindWindowByCaption(IntPtr ZeroOnly, string lpWindowName);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);

        [DllImport("user32.dll", SetLastError = true)]
        public static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string className, string windowTitle);

    public Form1()
    {
        InitializeComponent();
    }



        private void button1_Click(object sender, EventArgs e)
        {
            IntPtr hwndChild = IntPtr.Zero;
            IntPtr hwnd = IntPtr.Zero;
            hwnd = FindWindow(null, "MSPaintApp");
            hwndChild = FindWindowEx(hwnd, IntPtr.Zero, "Afx:00007FF765740000:8", null);
            SendMessage(hwndChild, BM_CLICK, IntPtr.Zero, IntPtr.Zero);
        }
    }
}

你能告诉我如何放置 X Y 坐标，它会点击一个子窗口。我看到很多帖子教如何做到这一点，但我不知道理解它，系统说不要问其他人的问题:(

Answer 1

对我来说，问题是应该使用 FindWindow("MSPaintApp", null) 搜索 MSPaintApp 窗口，因为 MSPaintApp 是类名，而不是窗口标题。

那么，Afx:00007FF765740000:8 不是MSPaintApp 的孩子，而是MSPaintView 的孩子，即MSPaintApp 的孩子。

此外，您不必“模拟”BM_CLICK，但必须先模拟 WM_LBUTTONDOWN，然后再模拟 WM_LBUTTONUP

请考虑这个似乎可以工作的示例（在 Windows 7 上）

class Program
{
    private const uint WM_LBUTTONDOWN = 0x201;
    private const uint WM_LBUTTONUP = 0x202;
    private const uint MK_LBUTTON = 0x0001;

    public delegate bool EnumWindowsProc(IntPtr hWnd, IntPtr parameter);

    [DllImport("user32.dll", SetLastError = true)]
    static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

    [DllImport("user32.dll", CharSet = CharSet.Auto)]
    static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);

    [DllImport("user32.dll", SetLastError = true)]
    public static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string className, string windowTitle);

    [DllImport("user32.dll", SetLastError = true)]
    public static extern bool EnumChildWindows(IntPtr hwndParent, EnumWindowsProc lpEnumFunc, IntPtr lParam);

    static IntPtr childWindow;

    static void Main(string[] args)
    {                     
        IntPtr hwndMain = FindWindow("MSPaintApp", null);
        IntPtr hwndView = FindWindowEx(hwndMain, IntPtr.Zero, "MSPaintView", null);
        // Getting the child windows of MSPaintView because it seems that the class name of the child isn't constant
        EnumChildWindows(hwndView, new EnumWindowsProc(EnumWindow), IntPtr.Zero);
        // Simulate press of left mouse button on coordinates 10, 10
        SendMessage(childWindow, WM_LBUTTONDOWN, new IntPtr(MK_LBUTTON), CreateLParam(10, 10));
        // Simulate release of left mouse button on coordinates 100, 100
        SendMessage(childWindow, WM_LBUTTONUP, new IntPtr(MK_LBUTTON), CreateLParam(100, 100)); 
    }

    static bool EnumWindow(IntPtr handle, IntPtr pointer)
    {
        // Get the first child because it seems that MSPaintView has only this child
        childWindow = handle;
        // Stop enumerating the windows
        return false;
    }

    private static IntPtr CreateLParam(int LoWord, int HiWord)
    {
        return (IntPtr)((HiWord << 16) | (LoWord & 0xffff));
    }
}

Answer 2

我要回到这里很多年了，但我很确定在最小化应用程序时不会传递鼠标事件窗口消息。我确定最小化的窗口无论如何都会受到不同的对待。

除此之外，当窗口没有被最小化时，这段代码是否有效？您可能想使用 Spy++ 多看一下窗口的结构，因为我认为您需要获取您尝试单击的任何内容的 hWnd 并在那里发送消息。很大程度上取决于应用程序本身的编写方式以及 UI 的绘制方式。