SendMessage Aplication beetween switch xp users

[C++ Programming]

Hello Friends,

I am trying to create one vc++ 6.0 application.

In which i have to create two application.

First application is server.
second is client.

server is running on admin user,and sending message to client.
client is getting the text sent by the admin.
client is login in different user in same computer.


########### code use in admin application #############

BroadcastSystemMessage(BSF_POSTMESSAGE,&dwApp,UWM_SEND,0,LPARAM)sSend.GetAt(i));

########################################################

Now i am trying that same thing using MailSlots,
But not succeeded Yet.
So please help me.

Any guys have any idea.

Thanks in advance.