Shoutbox

Hello, everyone

Now I send text to other contacts using following code in my plugin program:

for(int i=0;i<nLen;i++)
:endMessage(hChatWnd,WM_CHAR,lpChatMsg[i],0);

But how to send a hyperlink text to others?
For example, I need to send such text "you can click here to do something", when contact click "here", a "www.microsoft.com" IE page will be opened?

Could anyone know this and tell me? thanks a lot?