Hi Weides,
The fcode is a internal table that contains the function codes that should be excluded from screen after pf-status has been assigned.
In the above example, the function codes SAVE and FOTHER will be excluded,
If you want to open the SE41 transaction and enter SAPLSLVC_FULLSCREEN as Program Name and STANDARD_FULLSCREEN as Status, and click "View" (don't modify this, however copy that to a new program and status if you want).
In the next screen will be showed all the function codes contained in this status. If you assign this status to an screen or alv, for example (with SET PF-STATUS), all the function codes defined in this status will appear in the output screen.
The fcode internal table about that you have doubt should be populated with the function codes that you want not show at the output screen, using a statement EXCLUDING after the statement SET PF-STATUS.
Hope this help.