NotificationArea PromotedIcon

[Tripredacus]

When using Promoted Icons in NotificationArea, you need to specify a GUID. How can I go about finding the appropriate GUID for a program to put in there?

			<NotificationArea>
				<PromotedIcon1>
					<Path>%PROGRAMFILES%\Fabrikam\Application1.exe</Path>
					<GUID>{d8742dcb-3e6a-4b3c-b3fe-374623cdcf06}</GUID>
				</PromotedIcon1>
				<PromotedIcon2>
					<Path>%PROGRAMFILES%\Fabrikam\Application2.exe</Path>
					<GUID>{a1bc23cb-3456-bcde-abcd-feb363cacc88}</GUID>
				</PromotedIcon2>
			</NotificationArea>

GUID on TechNet