信使服务 (Messenger)

/* **********************************************
* Rainsoft Development Library for Microsoft.NET
*
* Copyright (c) 2004,2005 RainTrail Studio.China
* All Rigths Reserved!
* Author: Q.yuhen (qyuhen@hotmail.com)
********************************************** */
using System;
using System.Runtime.InteropServices;

namespace Rainsoft.Win32
{
/// <summary>
/// 系统信使服务
/// </summary>
public sealed class NetSend
{
[DllImport("netapi32.dll", EntryPoint="NetMessageBufferSend", CharSet=CharSet.Unicode)]
private static extern int NetMessageBufferSend(
string servername,
string msgname,
string fromname,
[MarshalAs(UnmanagedType.LPArray, ArraySubType = UnmanagedType.U1, SizeParamIndex = 4)] byte[] buf,
[MarshalAs(UnmanagedType.U4)] int buflen);

private NetSend(){}

/// <summary>
/// 发送消息
/// </summary>
/// <param name="fromName">发送人</param>
/// <param name="toName">接收人(机器名或者IP)</param>
/// <param name="message">消息内容</param>
/// <returns></returns>
public static bool Send(string fromName, string toName, string message)
{
byte[] buf = System.Text.Encoding.Unicode.GetBytes(message);
return NetMessageBufferSend(null, toName, fromName, buf, buf.Length) == 0;
}
}
}