This routine from Leland creates the command E3, used for AutoCAD Civil 3D only. It will open up the correct properties or editing command depending on the object selected. For example, if you select a pipe network structure, the Structure Properties dialog box will open. If you select an alignment, the Alignment Properties dialog box will open. This LISP routine is a nice alternative to picking something then going to the Ribbon or right-clicking.
After you load the LISP routine, type in the command E3 and select a supported Civil 3D object. Open the LISP file in Notepad to see a list of supported object types.