Raise event..........Help me out

Question

Please tell me how can I trigger event from ABAP program???
I have not work on this ever....Please tell me in detail......
Thanks in Advance........

Answer 1

Hi Pousali,
You can raise events in ABAP using the RAISE EVENT statement.
The syntax is
RAISE EVENT <evt> EXPORTING... <ei> = <f i>...
Raising of events have got application in Object Oriented Programming, where you can give the coding for a Method to be executed when an event is raised.
In classes, if you want to raise events,
it should be defined as follows.
EVENTS  critical_value EXPORTING
             value(excess) TYPE i.
The event can be raised as follows.
RAISE EVENT critical_value
         EXPORTING excess = diff.
In classes, user-defined events can be implemented by 5 steps:
1) defining the event ( as specified above )
2) defining the event handler method
eg:
METHODS handle_excess FOR EVENT critical_value      OF counter IMPORTING excess.
3) Raising of the event using RAISE EVENT stmt (as specified above)
4) Provide the implementation of the method defined in step 2.
5) Register the event by using the statement SET HANDLER statement.
In the case of pre-defined events like <b>double click , right click </b> , you need to do steps 2), 4) and 5) as the event has been defined before.
Sample program can be obtained from the following link.
http://help.sap.com/saphelp_nw04/helpdata/en/41/7af4eca79e11d1950f0000e82de14a/content.htm
Regards,
SP.