在C#中从外部应用程序获取UI文本

using System;
using System.Runtime.InteropServices;
using System.Text;

public class Win32API
{
    [DllImport("user32.dll")]
    public static extern IntPtr GetForegroundWindow();

    [DllImport("user32.dll")]
    public static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int count);
}

public class Program
{
    public static void Main()
    {
        IntPtr hWnd = Win32API.GetForegroundWindow();
        StringBuilder title = new StringBuilder(256);
        Win32API.GetWindowText(hWnd, title, 256);
        Console.WriteLine("Active window title: " + title.ToString());
    }
}