Answer / sai kalyan

At_line_selection is used to display the detailed infor
mation on secondary window for selecting line from privious
list.

At user command is used for user defined function keys

Answer / rammohan

at line-selection validates the entire line and displays
the secondary list based on 1st list condition means where
ever u double-click on line it validates.

sy-lisel+0(field_length) = <conditin>.

at user-command validates the function keys to displys the
secondary list based on primary list conditions.

for this we are using sy-ucomm = <fcode>.

Answer / sumit sharma

At Line selection is an event which is triggered after the
first list output. It is used for interactive reporting to
display the detailed information after double clicking the
line or the feild(using getcursor command) in the basic
list.

At User Command is used to define our own function keys,
the best use is in creating our own menu for a list.

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