C# 调用EnumDisplayMonitors 和GetMonitorInfo 获取屏幕大小

在C#中调用EnumDisplayMonitors和GetMonitorInfo函数获取屏幕大小，您可以使用以下代码：

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Drawing;

class Program
{
    [DllImport("user32.dll")]
    static extern bool EnumDisplayMonitors(IntPtr hdc, IntPtr lprcClip, EnumMonitorsDelegate lpfnEnum, IntPtr dwData);

    [DllImport("user32.dll")]
    static extern bool GetMonitorInfo(IntPtr hMonitor, ref MonitorInfoEx lpmi);

    delegate bool EnumMonitorsDelegate(IntPtr hMonitor, IntPtr hdcMonitor, ref Rect lprcMonitor, IntPtr dwData);

    [StructLayout(LayoutKind.Sequential)]
    public struct Rect
    {
        public int left;
        public int top;
        public int right;
        public int bottom;
    }

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
    public struct MonitorInfoEx
    {
        public int cbSize;
        public Rect rcMonitor;
        public Rect rcWork;
        public uint dwFlags;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
        public string szDevice;
    }

    static bool MonitorEnumProc(IntPtr hMonitor, IntPtr hdcMonitor, ref Rect lprcMonitor, IntPtr dwData)
    {
        MonitorInfoEx mi = new MonitorInfoEx();
        mi.cbSize = Marshal.SizeOf(mi);
        GetMonitorInfo(hMonitor, ref mi);
        int width = mi.rcMonitor.right - mi.rcMonitor.left;
        int height = mi.rcMonitor.bottom - mi.rcMonitor.top;
        Console.WriteLine("Screen width: " + width + ", height: " + height);
        return true;
    }

    static void Main(string[] args)
    {
        EnumDisplayMonitors(IntPtr.Zero, IntPtr.Zero, MonitorEnumProc, IntPtr.Zero);
    }
}

该代码使用EnumDisplayMonitors函数枚举所有屏幕，并使用GetMonitorInfo函数获取每个屏幕的大小。然后将屏幕的宽度和高度打印到控制台中。注意，该示例代码使用了一些Windows API结构体和方法，需要在代码中进行声明和引用。