skill command for remove of a netTrace

I try to config bindkeys for Net Tracer,  press <Key>1 to light a trace by left-click, these two work well:

hiSetBindKey("Layout" "<Key>1" "lntHiNetTracer()")

hiSetBindKey("Layout" "<Key>3" "lntRemoveAll()")

what is the skill command for remove of a trace by click? I only  find "lntRemoveTrace()", but this command requre "x_traceID", is there a skill command to select trace by click? thank you!