OOPS ALV: class for user command

Hi experts,

I have a screen into which an ALV Grid is embedded. At the screen, there is a user command, say, 'SCREEN_COMD'; at the ALV Grid, there is another one, named 'ALV_COMD' which perform the same action as what screen_comd1 does. If the user press 'ALV_COMD', 'SCREEN_COMD' should also be triggered. Would please tell me which class method can achieve this?

BR,

ts