gre.key_up

    gre.key_up(
        code,
        [channel]
    )

Send a key_up event to the application with the scancode passed in the parameters. channel is an optional parameter

Parameters

Parameter	Type	Description
code	#string	The UTF-8 character code to inject
channel	#string	[Optional] The Storyboard IO channel on which to send the event. If not specified the event is added directly into the current Storyboard application event queue if neither the environment variable or global GREIONAME variable are set.

Returns

Type	Description
#boolean	true for success, false for failure
#string	nil for success and an error message, e.g. "Can't open greio channel my_channel" on failure

Example:

function CBSpaceUp()
    gre.key_up(0x20)
end

function CBSendSpaceUp()
    local success, error = gre.key_up(0x20, "my_channel")
    if(success == false) then
        print(error)
        --handle error
    end
end