1、SM02

创建消息，并设定有效期。当用户刷新窗口或打开窗口时会显示。

这个消息对client中的所有用户有效

2、So00中创建“到期邮件”

So00中创建一个普通邮件，在下面选择收件人，收件人后面有三个可选项，选中第一个(闪电标志)：到期邮件

邮件发出后，当用户刷新窗口或打开窗口时会显示。

3、用ABAP程序创建系统提示：这个提示的效果像是SAP系统出错时的提示，用户体验可能不够好，代码如下：

*&---------------------------------------------------------------------*
*& Report YSENDMSG *
*&---------------------------------------------------------------------*
REPORT ysendmsg MESSAGE-ID zsd.
DATA: list LIKE uinfo OCCURS 0 WITH HEADER LINE.
DATA: mess LIKE sm04dic-popupmsg.
PARAMETERS: p_mandt LIKE sy-mandt DEFAULT sy-mandt,
p_user LIKE sy-uname,
p_mess1(40),
p_mess2(40),
p_mess3(25),
p_sender LIKE sy-uname DEFAULT sy-uname,
p_time TYPE i DEFAULT '1'.

AT SELECTION-SCREEN.
PERFORM check.

START-OF-SELECTION.
CONCATENATE p_sender 'says:' p_mess1 p_mess2 p_mess3 INTO mess.
CONDENSE mess.
DO p_time TIMES.
CALL FUNCTION 'TH_POPUP'
EXPORTING
client = p_mandt
user = p_user
MESSAGE = mess.
ENDDO.
*---------------------------------------------------------------------
* FORM check
*---------------------------------------------------------------------
FORM check.
CALL FUNCTION 'TH_USER_LIST'
TABLES
list = list.
READ TABLE list WITH KEY bname = p_user mandt = p_mandt.
IF sy-subrc <> 0.
READ TABLE list WITH KEY bname = p_user.
MESSAGE e001 WITH 'the user not on this client, but in'
list-mandt.
ENDIF.
ENDFORM. " check

http://eastviking.javaeye.com/blog/38828