C#中使用WIN32函数的回调函数

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace ConsoleApplication1
{
class Program
{
delegate bool EnumDesktopProc([MarshalAs(UnmanagedType.LPTStr)]string desktopName, int lParam);

[DllImport("user32.dll", CharSet = CharSet.Auto)]
static extern bool EnumDesktops(IntPtr windowStation, EnumDesktopProc callback, int lParam);

[DllImport("user32.dll", CharSet = CharSet.Auto)]
static extern IntPtr GetProcessWindowStation();

static bool OnDesktop(string name, int param)
{
Console.WriteLine(name);
return true;
}

static void Main(string[] args)
{
EnumDesktops(GetProcessWindowStation(), OnDesktop, 0);
}
}
}