New member questions

Hello to everyone. I am relatively new to LISP and I have a question. I would like to have a LISP routine that would do the following; When I select a layer, lets call it construction line, that the line command will automatically start. At the present moment to draw a construction line I must first select my construction layer then select the line command, then draw. There's 1 too many steps for my liking. Can this even be done? or is there an easier way?

Thanks to everyone who can help and advise.

 

There's a way to do it by putting the Line command on a tool palette then going into its properties to set the layer. After that any time you pick the Line command off your palette it will automatically put it on the construction layer.