Question

在本课的这一部分中，我将捕获工作进程的所有窗口：

private static bool EnumWindowsCallback(IntPtr hWnd, IntPtr lParam)
        {
            bool specialCapturing = false;

            if (hWnd == IntPtr.Zero) return false;

            if (!IsWindowVisible(hWnd)) return true;

            if (!countMinimizedWindows)
            {
                if (IsIconic(hWnd)) return true;
            }
            else if (IsIconic(hWnd) && useSpecialCapturing) specialCapturing = true;

            if (GetWindowText(hWnd) == PROGRAMMANAGER) return true;

            if (GetWindowText(hWnd).Contains("Test"))
                windowSnaps.Add(new WindowSnap(hWnd, specialCapturing));

            return true;
        }

        /// <summary>
        /// Get the collection of WindowSnap instances fro all available windows
        /// </summary>
        /// <param name="minimized">Capture a window even it's Minimized</param>
        /// <param name="specialCapturring">use special capturing method to capture minmized windows</param>
        /// <returns>return collections of WindowSnap instances</returns>
        public static WindowSnapCollection GetAllWindows(bool minimized, bool specialCapturring)
        {
            windowSnaps = new WindowSnapCollection();
            countMinimizedWindows = minimized;//set minimized flag capture
            useSpecialCapturing = specialCapturring;//set specialcapturing flag
            EnumWindowsCallbackHandler callback = new EnumWindowsCallbackHandler(EnumWindowsCallback);
            EnumWindows(callback, IntPtr.Zero);

            return new WindowSnapCollection(windowSnaps.ToArray(), true);
        }

最后，我在windowSnap中有两个示例，两个窗口的应用程序名称分别为Test。

在Form1中：

private void buttonSnap_Click(object sender, EventArgs e)
        {
            this.listBoxSnap.Items.Clear();
            this.pictureBoxSnap.Image = null;
            this.listBoxSnap.Items.AddRange
                (
            WindowSnap.GetAllWindows(this.checkBoxMinimized.Checked, this.checkBoxSpecialMode.Checked).ToArray()
                );
        }

现在在listBox（listBoxSnap）中，当我选择一个项目（例如，索引0中的项目）时，我想这样做是自动将击键发送给此应用程序的。例如，将击键ctrl + s发送到此特定的应用程序窗口，但不将应用程序窗口置于最前面或将其聚焦。

更新我的尝试：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;

namespace MinimizeCapture
{
    public partial class Form1 : Form
    {
        [DllImport("user32.dll")]
        static extern int SendMessage(IntPtr hWnd, int msg, int wParam, int lParam);
        [DllImport("user32.dll")]
        static extern bool SetForegroundWindow(IntPtr hWnd);

        // windows messages
        const int WM_KEYDOWN = 0x100;
        const int WM_KEYUP = 0x101;

        // "Ctrl key" virtual key-code
        const int VK_CONTROL = 0x11;

        public Form1()
        {
            InitializeComponent();
        }

        private void buttonSnap_Click(object sender, EventArgs e)
        {
            this.listBoxSnap.Items.Clear();
            this.pictureBoxSnap.Image = null;
            this.listBoxSnap.Items.AddRange
                (
            WindowSnap.GetAllWindows(this.checkBoxMinimized.Checked, this.checkBoxSpecialMode.Checked).ToArray()
                );
        }

        private void listBoxSnap_SelectedIndexChanged(object sender, EventArgs e)
        {
            WindowSnap snap = this.listBoxSnap.SelectedItem as WindowSnap;

            this.pictureBoxSnap.Image = snap.Image;


            SetForegroundWindow(snap.Handle);

            // hWnd is a handle of a window which should receive Ctrl+S
            SendMessage(snap.Handle, WM_KEYDOWN, VK_CONTROL, 0);
            SendMessage(snap.Handle, WM_KEYDOWN, (int)'s', 0);
            SendMessage(snap.Handle, WM_KEYUP, (int)'s', 0);
            SendMessage(snap.Handle, WM_KEYUP, VK_CONTROL, 0);

        }

该行：

SetForegroundWindow(snap.Handle);

将选定的窗口置于最前面，但ctrl +似乎根本不会影响该窗口。

Answer 1

据我从您的评论中可以看到，您需要向另一个窗口发送Ctrl+S击键。如果是这样，则需要将SendMessage WinAPI与WM_KEYDOWN和WM_KEYUP消息一起使用。

我假设您已经知道如何获取窗口句柄，因此请检查以下代码：

[DllImport("user32.dll")]
static extern int SendMessage(IntPtr hWnd, int msg, int wParam, int lParam);

// windows messages
const int WM_KEYDOWN = 0x100;
const int WM_KEYUP = 0x101;

// "Ctrl key" virtual key-code
const int VK_CONTROL = 0x11;

// hWnd is a handle of a window which should receive Ctrl+S
SendMessage(hWnd, WM_KEYDOWN, VK_CONTROL, 0);
SendMessage(hWnd, WM_KEYDOWN, (int)'s', 0);
SendMessage(hWnd, WM_KEYUP, (int)'s', 0);
SendMessage(hWnd, WM_KEYUP, VK_CONTROL, 0);

请注意：应该收到此消息的窗口必须突出显示！

如何将击键发送到其他Windows应用程序？

1 个答案: