Help with bindkey (toggle) for auto / single via

Can you help combining this code into using 1 bindkey that can toggle between auto and single via?

procedure( viaAuto()
le0ViaForm->viaMode->value= "Auto"
leHiCreateVia()
)

procedure( viaSingle()
le0ViaForm->viaMode->value= "Single"
leHiCreateVia()
)

hiSetBindKey("Layout" "Shift<Key>o" "viaAuto()")
hiSetBindKey("Layout" "Ctrl<Key>o" "viaSingle()")