C# 允许用户从另一个进程中选择控件/窗口

如何使用户能够从任何窗口选择控件？类似inspect.exe或WinySpy++的程序可以完成（参见屏幕截图）

编辑：

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“选择一个控件”是指如何在鼠标指针下获得控件的句柄，以便对其进行操作（例如，在其周围绘制框，获取其位置和名称）。我知道我需要使用WinAPI，只是不知道从哪里开始（如何在鼠标指针下获取控件的句柄）。

使用

GetCursorPos

函数获取当前光标位置

使用

WindowFromPoint

获取包含指定点的窗口

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至于画一个矩形，请看。

这里有一个开始：（这非常粗糙，需要更多的工作！）

在空白表单中，添加一个PictureBox和四个标签

将PictureBox的边框样式更改为FixedSingle

使用System.Runtime.InteropServices添加

向上显示在
使用

语句与其他

进行编码

连接的MouseDown（）、MouseMove和MouseUp（）事件 PictureBox使用下面的相应方法

运行它并在屏幕上拖动PictureBox

守则：

public partial class Form1 : Form
{

    [StructLayout(LayoutKind.Sequential)]
    public struct RECT
    {
        public int Left;
        public int Top;
        public int Right;
        public int Bottom;
    }

    public const int WM_GETTEXT = 0xD;
    public const int WM_GETTEXTLENGTH = 0x000E;

    [DllImport("user32.dll")]
    public static extern IntPtr WindowFromPoint(Point point);

    [DllImport("user32.dll", CharSet = CharSet.Auto)]
    public static extern int GetClassName(IntPtr handle, StringBuilder ClassName, int MaxCount);

    [DllImport("user32.dll")]
    public static extern int SendMessage(IntPtr handle, int msg, int Param1, int Param2);

    [DllImport("user32.dll")]
    public static extern int SendMessage(IntPtr handle, int msg, int Param, System.Text.StringBuilder text);

    [DllImport("user32.dll")]
    [return: MarshalAs(UnmanagedType.Bool)]
    public static extern bool GetWindowRect(IntPtr handle, out RECT Rect);

    public class WindowInfo
    {
        public IntPtr Handle;
        public string ClassName;
        public string Text;
        public Rectangle Rect;

        public WindowInfo(IntPtr Handle)
        {
            this.Handle = Handle;
            this.ClassName = GetWindowClassName(Handle);
            this.Text = GetWindowText(Handle);
            this.Rect = GetWindowRectangle(Handle);
        }
    }

    WindowInfo LastWindow = null;
    WindowInfo CurWindow;

    public Form1()
    {
        InitializeComponent();
    }

    private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Left)
        {
            pictureBox1.Cursor = Cursors.Cross;
        }
    }

    private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Left)
        {
            Point pt = Cursor.Position;
            this.Text = "Mouse Position: " + pt.ToString();
            this.CurWindow = new WindowInfo(WindowFromPoint(pt));

            label1.Text = "Handle: " + this.CurWindow.Handle.ToString("X");
            label2.Text = "Class: " + this.CurWindow.ClassName;
            label3.Text = "Text: " + this.CurWindow.Text;
            label4.Text = "Rectangle: " + this.CurWindow.Rect.ToString();

            if (this.LastWindow == null)
            {
                ControlPaint.DrawReversibleFrame(this.CurWindow.Rect, Color.Black, FrameStyle.Thick);
            }
            else if (!this.CurWindow.Handle.Equals(this.LastWindow.Handle))
            {
                ControlPaint.DrawReversibleFrame(this.LastWindow.Rect, Color.Black, FrameStyle.Thick);
                ControlPaint.DrawReversibleFrame(this.CurWindow.Rect, Color.Black, FrameStyle.Thick);                   
            }

            this.LastWindow = this.CurWindow;
        }
    }

    private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Left)
        {
            pictureBox1.Cursor = Cursors.Default;
            if (this.LastWindow != null)
            {
                ControlPaint.DrawReversibleFrame(this.LastWindow.Rect, Color.Black, FrameStyle.Thick);

                // ... do something with "this.LastWindow" ...

            }
        }
    }

    public static string GetWindowClassName(IntPtr handle)
    {
        StringBuilder buffer = new StringBuilder(128);
        GetClassName(handle, buffer, buffer.Capacity);
        return buffer.ToString();
    }

    public static string GetWindowText(IntPtr handle)
    {
        StringBuilder buffer = new StringBuilder(SendMessage(handle, WM_GETTEXTLENGTH,0,0) + 1);
        SendMessage(handle, WM_GETTEXT, buffer.Capacity, buffer);
        return buffer.ToString();
    }

    public static Rectangle GetWindowRectangle(IntPtr handle)
    {
        RECT rect = new RECT();
        GetWindowRect(handle, out rect);
        return new Rectangle(rect.Left, rect.Top, (rect.Right - rect.Left) + 1, (rect.Bottom - rect.Top) + 1);
    }

}

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“选择控件”是什么意思？把焦点放在它身上？调用它的关联命令？还有别的吗？它检查操作系统消息。您必须检查Windows API以了解这一点。我已经更新了这个问题，很抱歉没有从一开始就更好地解释它。

GetCursorPos

，

WindowFromPoint

。创建一个无边框的最大化表单，将其BackgroundImage属性设置为您使用Graphics.CopyFromScreen（）制作的屏幕截图。使用绘制事件绘制矩形。您需要的基本代码在中。其他有用的API调用：GetWindowText、GetClassName、GetWindowLongA、GetWindowRect。。。请访问pinvoke.net获取声明。谢谢。救了我一天