怎么用C#做类似于MSN，常驻在屏幕右下角的应用程序

如何用C#做类似于MSN，常驻在屏幕右下角的应用程序？
如题。
问题一，
比如我点了主窗口上的（关闭）按钮，程序的窗口都关掉，然后在屏幕右下角出现我这个程序的图标。点了它以后可以再打开程序窗口。

问题二，
另外，我的程序是运行在那里的，socket通信。接收到socket消息之后，怎样让屏幕右下角的图标一闪一闪？同时有声音提示？

这个就象MSN的效果，，要怎么实现？有什么参考的教程，例子么？

[解决办法]
http://blog.csdn.net/lincomin/archive/2006/10/08/1325849.aspx
二、当接收到消息之后，不断改变托盘的图标。
[解决办法]
http://www.51cto.com/art/200509/3974.htm
[解决办法]
1 NotifyIcon控件
2 改变NotifyIcon的ICO
[解决办法]
楼上的OK了
[解决办法]
一搜一大片


<head>
<SCRIPT language=javascript>
//more javascript from http://www.webjx.com
window.onload = enetgetMsg;
window.onresize = enetresizeDiv;
window.onerror = function(){}
var enetdivTop,enetdivLeft,enetdivWidth,enetdivHeight,enetdocHeight,enetdocWidth,enetobjTimer,i = 0;
function enetgetMsg()
{
try{
enetdivTop = parseInt(document.getElementById( "enetMeng ").style.top,10)
enetdivLeft = parseInt(document.getElementById( "enetMeng ").style.left,10)
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document.getElementById( "enetMeng ").style.visibility= "visible "
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catch(e){}
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function enetresizeDiv()
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enetdivWidth = parseInt(document.getElementById( "enetMeng ").offsetWidth,10)
enetdocWidth = document.body.clientWidth;
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document.getElementById( "enetMeng ").style.top = enetdocHeight - enetdivHeight + parseInt(document.body.scrollTop,10)
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catch(e){}
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function enetmoveDiv()
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}
catch(e){}
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function enetcloseDiv()
{
document.getElementById( 'enetMeng ').style.visibility= 'hidden ';
if(enetobjTimer) window.clearInterval(enetobjTimer)
}
</SCRIPT>

<DIV id=enetMeng
style= "BORDER-RIGHT: #455690 1px solid; BORDER-TOP: #a6b4cf 1px solid; Z-INDEX: 99999; LEFT: 0px; VISIBILITY: visible; BORDER-LEFT: #a6b4cf 1px solid; WIDTH: 241px; BORDER-BOTTOM: #455690 1px solid; POSITION: absolute; TOP: -200px; HEIGHT: 157px ">

<TABLE WIDTH=255 BORDER=0 CELLPADDING=0 CELLSPACING=0 bgcolor= "#DAE6FC ">
<TR>

<TD height= "30 " valign= "top " background= "qqimages/heihei_1.jpg ">
<table width= "255 " height= "19 " border= "0 " cellpadding= "0 " cellspacing= "0 ">
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<TR>
<TD height= "122 " valign= "top "> <table width= "100% " border= "0 " cellspacing= "0 " cellpadding= "1 ">
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</tr>
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</TABLE> </div>

[解决办法]
1.写托盘
2.收到数据时更改托盘图标
[解决办法]
1 NotifyIcon控件
2 改变NotifyIcon的ICO

[解决办法]
mark
[解决办法]
同意这个：
1 NotifyIcon控件
2 改变NotifyIcon的ICO

怎么用C#做类似于MSN常驻在屏幕右下

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