Using Blizzard's Interface Options Addons Panel in World of Warcraft

MyAddOnSettings.lua

function MyAddOnSettingsFrame_OnLoad(self)
  -- Set the name for the Category for the Panel
	self.name = "My AddOn" .. GetAddOnMetadata("MyAddon", "Version")

	-- When the player clicks okay, run this function.
	self.okay = function (self) print("MyAddOnSettings: Okay clicked") end

	-- When the player clicks cancel, run this function.
	self.cancel = function (self) print("MyAddOnSettings: Cancel clicked.") end

	-- Add the panel to the Interface Options
	InterfaceOptions_AddCategory(self)
end

MyAddOnSettings.xml

<Ui xmlns="http://www.blizzard.com/wow/ui/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.blizzard.com/wow/ui/ .. \FrameXML\UI.xsd">
  <Script file="MyAddOnSettings.lua"/>
  <Frame name="MyAddOnSettingsFrame">
    <Scripts>
		  <OnLoad function="MyAddOnSettingsFrame_OnLoad"/>
		</Scripts>
	</Frame>
</Ui>