如何在超时的情况下实现等效的WNetAddConnection2

下面对WNetAddConnection2的调用似乎永远挂起。请注意，机器名称是故意错误的——我希望它能快速失败，而不是永远阻塞。有没有一种方法可以实现类似的功能，但需要超时？

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Diagnostics;
namespace WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        [StructLayout(LayoutKind.Sequential)]
        public class NETRESOURCE
        {
            public int dwScope;
            public int dwType;
            public int dwDisplayType;
            public int dwUsage;
            public string LocalName;
            public string RemoteName;
            public string Comment;
            public string Provider;
        }
        [DllImport("mpr.dll")]
        public static extern int WNetAddConnection2(NETRESOURCE netResource, string password, string username, int flags);
        private void Form1_Load(object sender, EventArgs e)
        {
            NETRESOURCE myResource = new NETRESOURCE();
            myResource.dwScope = 0;
            myResource.dwType = 0; //RESOURCETYPE_ANY
            myResource.dwDisplayType = 0;
            myResource.LocalName = "";
            myResource.RemoteName = @"''invalid.machine.com";
            myResource.dwUsage = 0;
            myResource.Comment = "";
            myResource.Provider = "";
            int returnValue = WNetAddConnection2(myResource, "password", "username", 0); //hangs forever
            Debug.Print("Finished connecting");
        }
    }
}