<customUI xmlns="http://schemas.microsoft.com/office/2009/07/customui">
	<ribbon startFromScratch="false">
		<tabs>
			<tab id="customTab" label="Custom Tab">
				<group id="customGroup" label="Custom Group">
					<button id="customButton" label="Custom Button" imageMso="HappyFace" size="large" onAction="Callback" />
				</group>
			</tab>
		</tabs>
	</ribbon>
</customUI>