Here you are:
macroScript ToggleCoronaRenderSelected
category:"Corona"
toolTip:"Toggle Corona render viewport selection"
icon:#("Maxscript",2)
(
callbacks.removeScripts id:#CoronaToggleRenderViewportSelection
callbacks.addScript #renderParamsChanged "updateToolbarButtons()" id:#CoronaToggleRenderViewportSelection
on isEnabled do (
return hasproperty renderers.current "renderSelected_mode"
)
on isChecked do (
if (hasproperty renderers.current "renderSelected_mode") then (
if (renderers.current.renderSelected_mode==1) then true else false
)
else return false
)
on execute do (
if (hasproperty renderers.current "renderSelected_mode") then (
animate off (
if renderers.current.renderSelected_mode!=1 then renderers.current.renderSelected_mode=1 else renderers.current.renderSelected_mode=0
)
)
)
)
Good Luck