Regarding real time

Hi experts.

Let me to have a solution for the following issue.

The program lines as follows.

Parameters : p_matnr like mara-matnr.

start-of-selection.

if p_matnr is not initial.

write : /1 p_matnr.

endif.

In this program i will give the input in the selection screen. Without using execute button i should get the output. This is incorporated with the real time. Thats why i have the question.

useful points will be rewarded.

regards,

Sankar.