<function name="Register" parent="numpad" type="libraryfunc"> <description>Registers a numpad library action for use with <page>numpad.OnDown</page> and <page>numpad.OnUp</page></description> <realm>Server</realm> <file line="241-L245">lua/includes/modules/numpad.lua</file> <args> <arg name="id" type="string">The unique id of your action.</arg> <arg name="func" type="function">The function to be executed. <callback> <arg type="Player" name="ply">The player who pressed the button</arg> <arg type="vararg" name="data">The 4th and all subsequent arguments passed from <page>numpad.OnDown</page> and/or <page>numpad.OnUp</page>.</arg> <ret type="boolean" name="data">Returning `false` in this function will remove the listener which triggered this function <ret type="boolean" name="data" default="nil">Returning `false` in this function will remove the listener which triggered this function (example: return `false` if one of your varargs is an entity which is no longer valid)</ret> </callback> </arg> </args> </function>