[Closed] IMPOSSIBLE? I dont think so

hey, I have some features which I dont know if they are possible or not.

Is it possible to make the user enter a mode where he can pick a vertex/edge/face?

Is it possible to create a tool, which will update automatically base on current edge/vertex/face selection?

Is it possible to create create a tool, which will update based on mouse position, I mean like selecting edge loops based on edges that are below mouse. I know one script which makes this possible to select edgeLoops but he encrypted the code, so I have no idea what has he done.

See ya