select all objects of a certain layer

[Lucatop]

I am beginning to move the first steps in using autolisp. wandering on the web I find nothing useful to select all objects of a certain layer.
qselect for example opens me its specific menu and I can't pre set the selectionl ayer + layer name automatically
thanks in advance

 

[Cristallo]

with the lisp you have to use ssget with selection filters
a thing like (ssget "x"((8 . "layer to filter"))))
Check if the group is 8... I'm going to arm.

 

[Lucatop]

Thank you very much