app: protocol in Help Center and Support - allow run???!!!???

[Bartosz Kwitkowski <bartosz () wb pl>]

In HCS is a protocol app: . When we use this protocol in HCS we can run local program without params.

EXAMPLE:
 
<a href="app:%WINDIR%\system32\cmd.exe"> calc </a>

Where we can find source of it?

C:\WINDOWS\PCHEALTH\HELPCTR\System\HomePage__DESKTOP.htm

Regards,
Bartosz