如何在C#中找到运行应用程序的屏幕

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

[DllImport("user32.dll")]
private static extern IntPtr GetForegroundWindow();

[DllImport("user32.dll")]
private static extern int GetWindowThreadProcessId(IntPtr hWnd, out int lpdwProcessId);

private static int GetWindowProcessId(IntPtr hwnd)
{
    int processId = 0;
    GetWindowThreadProcessId(hwnd, out processId);
    return processId;
}

private static string GetWindowTitle(IntPtr hwnd)
{
    int length = GetWindowTextLength(hwnd);
    StringBuilder sb = new StringBuilder(length + 1);
    GetWindowText(hwnd, sb, sb.Capacity);
    return sb.ToString();
}

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern int GetWindowTextLength(IntPtr hWnd);

private static void Main()
{
    IntPtr hwnd = GetForegroundWindow();
    int processId = GetWindowProcessId(hwnd);
    string windowTitle = GetWindowTitle(hwnd);

    Console.WriteLine($"Window Title: {windowTitle}");
    Console.WriteLine($"Process ID: {processId}");
}