求助一个邮件槽问题！！散分!

欲做一个类似WIN net send 的单向广播程序,我利用邮件槽写的程序如下:()!
void CMailorDlg::OnSend() 
{
// TODO: Add your control notification handler code here
    CString strMessage;
strMessage=m_strMessage;
  LPCTSTR MyWinPopupSlot="\\\\*\\mailslot\\MyWinPopup";
HANDLE hMail;
  DWORD dwWrite;
BOOL bOK;
hMail=CreateMailslot(MyWinPopupSlot,512,MAILSLOT_WAIT_FOREVER,
(LPSECURITY_ATTRIBUTES)NULL);//创建邮件槽
hMail=CreateFile(MyWinPopupSlot,GENERIC_WRITE,FILE_SHARE_READ,
(LPSECURITY_ATTRIBUTES)NULL,OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
(HANDLE)NULL);//打开邮件槽
if(hMail==INVALID_HANDLE_VALUE)
{
 AfxMessageBox("IDS_CREATE_MAILSLOT_FAILURE",MB_OKCANCEL);
   return ;
}
bOK=WriteFile(hMail,strMessage,(DWORD)strMessage.GetLength()+1,
          &dwWrite,(LPOVERLAPPED)NULL);//写邮件槽
if(bOK==FALSE)
  {
     AfxMessageBox("IDS_WRITEMAILSLOT_FAILURE",MB_OKCANCEL);
     CloseHandle(hMail);
     return ;
   
}
  AfxMessageBox("IDS_MAIL_SENDOUT_OK",MB_OKCANCEL);
  CloseHandle(hMail);
return ;}
程序能运行,但是在局域网中没有任何反映,没有见到类是信使服务的对话筐.
请问是为什么?(我只想要单向通讯的程序!)