<s>
Windows	B-Device
Media	I-Device
Center	I-Device
(	O
WMC	O
)	O
is	O
a	O
defunct	O
digital	B-Application
video	I-Application
recorder	I-Application
and	O
media	B-Device
player	I-Device
created	O
by	O
Microsoft	O
.	O
</s>
<s>
Media	O
Center	O
was	O
first	O
introduced	O
to	O
Windows	O
in	O
2002	O
on	O
Windows	B-Application
XP	I-Application
Media	I-Application
Center	I-Application
Edition	I-Application
(	O
MCE	O
)	O
.	O
</s>
<s>
It	O
was	O
included	O
in	O
Home	O
Premium	O
and	O
Ultimate	O
editions	O
of	O
Windows	B-Application
Vista	I-Application
,	O
as	O
well	O
as	O
all	O
editions	O
of	O
Windows	B-Device
7	I-Device
except	O
Starter	O
and	O
Home	O
Basic	O
.	O
</s>
<s>
It	O
was	O
also	O
available	O
on	O
Windows	B-Application
8	I-Application
Pro	O
and	O
Windows	B-Device
8.1	I-Device
Pro	O
as	O
a	O
paid	O
add-on	O
,	O
before	O
being	O
discontinued	O
in	O
Windows	B-Operating_System
10	I-Operating_System
,	O
although	O
it	O
can	O
reportedly	O
be	O
unofficially	O
reinstalled	O
using	O
a	O
series	O
of	O
Command	O
Prompt	O
commands	O
.	O
</s>
<s>
Media	O
Center	O
can	O
play	O
slideshows	B-Application
,	O
videos	O
and	O
music	O
from	O
local	O
hard	B-Device
drives	I-Device
,	O
optical	O
drives	O
and	O
network	B-Architecture
locations	O
.	O
</s>
<s>
Content	O
can	O
be	O
played	O
back	O
on	O
computer	B-Device
monitors	I-Device
or	O
on	O
television	O
sets	O
through	O
the	O
use	O
of	O
devices	O
called	O
Windows	B-Device
Media	I-Device
Center	I-Device
Extenders	O
.	O
</s>
<s>
Up	O
to	O
six	O
TV	B-Device
tuners	I-Device
on	O
a	O
tuner	B-Device
card	I-Device
are	O
supported	O
simultaneously	O
.	O
</s>
<s>
Both	O
standard	B-Device
-	I-Device
and	O
high-definition	B-Device
unencrypted	O
video	O
are	O
supported	O
through	O
DVB-T	O
and	O
ATSC	B-Device
standards	I-Device
.	O
</s>
<s>
It	O
is	O
possible	O
to	O
view	O
encrypted	O
cable	O
television	O
channels	O
by	O
using	O
an	O
internal	O
or	O
external	O
tuner	O
that	O
supported	O
CableCARD	B-Application
.	O
</s>
<s>
Shortly	O
after	O
Windows	B-Device
7	I-Device
's	O
2009	O
release	O
,	O
Microsoft	O
disbanded	O
the	O
Media	O
Center	O
development	O
team	O
,	O
thus	O
abandoning	O
any	O
further	O
software	O
developments	O
.	O
</s>
<s>
Consequently	O
,	O
the	O
Media	O
Center	O
interface	O
remained	O
unchanged	O
for	O
Windows	B-Application
8	I-Application
and	O
8.1	B-Device
users	O
.	O
</s>
<s>
In	O
May	O
2015	O
,	O
Microsoft	O
announced	O
that	O
Windows	B-Device
Media	I-Device
Center	I-Device
would	O
be	O
discontinued	O
on	O
Windows	B-Operating_System
10	I-Operating_System
,	O
and	O
that	O
it	O
would	O
be	O
removed	O
when	O
upgrading	O
;	O
but	O
stated	O
that	O
those	O
upgrading	O
from	O
a	O
version	O
of	O
Windows	O
that	O
included	O
the	O
Media	O
Center	O
application	O
would	O
receive	O
the	O
paid	O
Windows	B-Device
DVD	I-Device
Player	I-Device
app	O
for	O
free	O
to	O
maintain	O
DVD	O
playback	O
functionality	O
.	O
</s>
<s>
Windows	B-Device
Media	I-Device
Center	I-Device
,	O
codenamed	O
"	O
Freestyle	O
"	O
,	O
was	O
first	O
included	O
with	O
Windows	B-Application
XP	I-Application
Media	I-Application
Center	I-Application
Edition	I-Application
.	O
</s>
<s>
A	O
new	O
version	O
of	O
the	O
WMC	O
was	O
included	O
in	O
the	O
Home	O
Premium	O
and	O
Ultimate	O
Windows	B-Application
Vista	I-Application
editions	O
.	O
</s>
<s>
The	O
user	B-Application
interface	I-Application
was	O
redesigned	O
and	O
tailored	O
for	O
the	O
16:9	O
aspect	O
ratio	O
.	O
</s>
<s>
Support	O
for	O
multiple	O
tuners	B-Device
was	O
added	O
in	O
later	O
releases	O
and	O
varies	O
depending	O
upon	O
the	O
version	O
of	O
the	O
operating	O
system	O
purchased	O
.	O
</s>
<s>
Support	O
for	O
many	O
Windows	B-Device
Media	I-Device
Center	I-Device
Extender	O
hardware	O
devices	O
,	O
that	O
had	O
been	O
released	O
pre-Vista	O
,	O
was	O
also	O
dropped	O
leaving	O
many	O
owners	O
out	O
of	O
luck	O
if	O
they	O
did	O
not	O
upgrade	O
to	O
one	O
of	O
the	O
supported	O
Windows	B-Application
Vista	I-Application
versions	I-Application
from	O
the	O
Windows	B-Application
XP	I-Application
Media	I-Application
Center	I-Application
Edition	I-Application
.	O
</s>
<s>
Native	O
DVD/MPEG	O
-2	O
support	O
.	O
</s>
<s>
Addition	O
of	O
Movies	O
and	O
DVD	O
button	O
which	O
lists	O
all	O
the	O
movies	O
on	O
the	O
hard	B-Device
drive	I-Device
and	O
DVD	O
.	O
</s>
<s>
Any	O
video	O
playing	O
is	O
overlaid	O
on	O
the	O
background	O
of	O
the	O
user	B-Application
interface	I-Application
,	O
if	O
the	O
UI	O
is	O
navigated	O
while	O
the	O
video	O
is	O
still	O
playing	O
.	O
</s>
<s>
Support	O
for	O
high-definition	B-Device
(	O
HD	O
)	O
content	O
,	O
and	O
CableCARD	B-Application
support	O
.	O
</s>
<s>
Uses	O
the	O
.NET	B-Application
2.0	O
CLR	O
.	O
</s>
<s>
The	O
update	O
tweaked	O
the	O
user	B-Application
interface	I-Application
,	O
added	O
support	O
for	O
digital	B-Device
subchannels	I-Device
,	O
QAM	B-Device
,	O
DVB-S	O
and	O
MHEG	O
,	O
and	O
increased	O
the	O
total	O
number	O
of	O
each	O
type	O
of	O
tuner	O
allowed	O
.	O
</s>
<s>
Beta	O
versions	O
also	O
supported	O
H.264	B-Application
format	O
but	O
this	O
feature	O
was	O
removed	O
upon	O
release	O
to	O
manufacturing	O
.	O
</s>
<s>
An	O
updated	O
version	O
of	O
the	O
WMC	O
was	O
included	O
in	O
all	O
the	O
Windows	B-Device
7	I-Device
editions	O
except	O
Starter	O
and	O
Home	O
Basic	O
.	O
</s>
<s>
Much	O
of	O
the	O
functionality	O
added	O
with	O
TV	O
Pack	O
2008	O
was	O
included	O
with	O
the	O
version	O
of	O
Media	O
Center	O
included	O
in	O
Windows	B-Device
7	I-Device
,	O
along	O
with	O
an	O
update	O
to	O
the	O
user	B-Application
interface	I-Application
.	O
</s>
<s>
The	O
WMC	O
has	O
retained	O
much	O
of	O
the	O
design	O
and	O
feel	O
of	O
its	O
predecessor	O
,	O
but	O
with	O
a	O
variety	O
of	O
user	B-Application
interface	I-Application
shortcuts	O
and	O
browsing	O
capabilities	O
.	O
</s>
<s>
Playback	O
of	O
H.264	B-Application
video	I-Application
both	O
locally	O
and	O
through	O
a	O
Media	O
Center	O
Extender	O
(	O
including	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
)	O
is	O
supported	O
.	O
</s>
<s>
All	O
Windows	B-Device
7	I-Device
versions	O
now	O
support	O
up	O
to	O
four	O
tuners	B-Device
of	O
each	O
type	O
(	O
QAM	B-Device
,	O
ATSC	B-Device
,	O
CableCARD	B-Application
,	O
NTSC	O
,	O
etc	O
.	O
</s>
<s>
When	O
the	O
left	O
or	O
right	O
remote	B-Protocol
control	I-Protocol
buttons	O
are	O
held	O
down	O
to	O
browse	O
the	O
library	O
quickly	O
,	O
a	O
two-letter	O
prefix	O
of	O
the	O
current	O
album	O
name	O
is	O
prominently	O
shown	O
as	O
a	O
visual	O
aid	O
.	O
</s>
<s>
For	O
television	O
support	O
,	O
the	O
Windows	B-Device
Media	I-Device
Center	I-Device
"	O
TV	O
Pack	O
"	O
released	O
by	O
Microsoft	O
in	O
2008	O
is	O
incorporated	O
into	O
the	O
WMC	O
.	O
</s>
<s>
This	O
includes	O
support	O
for	O
CableCARD	B-Application
and	O
North	O
American	O
(	O
ATSC	B-Device
)	O
clear	B-Device
QAM	I-Device
tuners	I-Device
,	O
as	O
well	O
as	O
creating	O
lists	O
of	O
favorite	O
stations	O
.	O
</s>
<s>
A	O
gadget	B-Application
for	O
the	O
WMC	O
is	O
also	O
included	O
.	O
</s>
<s>
The	O
Public	O
folder	O
also	O
contains	O
a	O
hidden	O
Recorded	O
TV	O
library	O
that	O
appears	O
in	O
the	O
Windows	B-Protocol
Explorer	I-Protocol
side	O
pane	O
when	O
TV	O
is	O
set	O
up	O
in	O
Media	O
Center	O
for	O
the	O
first	O
time	O
.	O
</s>
<s>
The	O
WMC	O
was	O
not	O
included	O
with	O
any	O
of	O
Windows	B-Application
8	I-Application
editions	O
.	O
</s>
<s>
Instead	O
,	O
it	O
was	O
part	O
of	O
a	O
Windows	B-Application
8	I-Application
Media	O
Center	O
Pack	O
add-on	O
available	O
only	O
for	O
retail	O
versions	O
Windows	B-Application
8	I-Application
Pro	O
,	O
and	O
Windows	B-Application
8	I-Application
Pro	O
Pack	O
that	O
upgrades	O
Windows	B-Application
8	I-Application
to	O
Windows	B-Application
8	I-Application
Pro	O
available	O
through	O
the	O
Add	O
features	O
to	O
Windows	B-Application
8	I-Application
service	O
.	O
</s>
<s>
The	O
Windows	B-Application
8	I-Application
Pro	O
Pack	O
was	O
available	O
for	O
US	O
$69.99	O
,	O
while	O
the	O
Windows	B-Application
8	I-Application
Media	O
Center	O
Pack	O
was	O
available	O
at	O
no	O
charge	O
from	O
October	O
26	O
,	O
2012	O
,	O
until	O
January	O
31	O
,	O
2013	O
,	O
as	O
a	O
promotion	O
to	O
encourage	O
users	O
to	O
upgrade	O
to	O
Windows	B-Application
8	I-Application
.	O
</s>
<s>
After	O
the	O
promotion	O
,	O
the	O
price	O
of	O
the	O
Windows	B-Application
8	I-Application
and	O
8.1	B-Device
Media	O
Center	O
Pack	O
changed	O
to	O
US	O
$9.99	O
,	O
until	O
it	O
was	O
discontinued	O
on	O
October	O
30	O
,	O
2015	O
.	O
</s>
<s>
The	O
WMC	O
cannot	O
run	O
on	O
startup	B-Operating_System
or	O
on	O
top	O
of	O
other	O
windows	O
because	O
of	O
"	O
new	O
Windows	O
OS	O
requirements	O
and	O
behaviors	O
"	O
.	O
</s>
<s>
On	O
Windows	B-Application
10	I-Application
Technical	I-Application
Preview	I-Application
builds	O
,	O
adding	O
Windows	B-Device
Media	I-Device
Center	I-Device
using	O
a	O
purchased	O
Windows	B-Device
8.1	I-Device
product	O
key	O
would	O
result	O
in	O
the	O
system	O
subsequently	O
identifying	O
itself	O
as	O
"	O
Windows	B-Device
8.1	I-Device
Pro	O
with	O
Media	O
Center	O
"	O
,	O
along	O
with	O
a	O
warning	O
that	O
the	O
OS	O
has	O
not	O
been	O
activated	O
.	O
</s>
<s>
During	O
the	O
2015	O
Build	O
developers	O
 '	O
conference	O
,	O
a	O
Microsoft	O
executive	O
confirmed	O
that	O
Media	O
Center	O
,	O
with	O
its	O
TV	O
receiver	O
and	O
PVR	O
functionality	O
,	O
would	O
not	O
be	O
updated	O
for	O
or	O
included	O
with	O
Windows	B-Operating_System
10	I-Operating_System
;	O
thus	O
the	O
product	O
would	O
be	O
discontinued	O
.	O
</s>
<s>
Those	O
upgrading	O
to	O
Windows	B-Operating_System
10	I-Operating_System
from	O
a	O
version	O
of	O
Windows	O
that	O
included	O
the	O
Media	O
Center	O
application	O
would	O
receive	O
the	O
paid	O
Windows	B-Device
DVD	I-Device
Player	I-Device
app	O
for	O
free	O
to	O
maintain	O
DVD	O
playback	O
functionality	O
after	O
the	O
first	O
Windows	O
Update	O
.	O
</s>
<s>
Some	O
users	O
who	O
wanted	O
Microsoft	O
to	O
provide	O
an	O
official	O
port	O
of	O
the	O
Windows	B-Device
Media	I-Device
Center	I-Device
for	O
Windows	B-Operating_System
10	I-Operating_System
created	O
two	O
change.org	B-Application
petitions	O
and	O
sent	O
thousands	O
of	O
requests	O
to	O
Microsoft	O
via	O
their	O
Windows	B-Application
Feedback	I-Application
app	O
included	O
with	O
Windows	B-Operating_System
10	I-Operating_System
.	O
</s>
<s>
In	O
early	O
July	O
2015	O
,	O
Microsoft	O
announced	O
that	O
the	O
Electronic	B-Device
Program	I-Device
Guide	I-Device
(	O
EPG	B-Device
)	O
for	O
Windows	B-Device
Media	I-Device
Center	I-Device
was	O
being	O
updated	O
on	O
July	O
7	O
,	O
2015	O
with	O
new	O
video	O
data	O
packages	O
.	O
</s>
<s>
This	O
update	O
to	O
the	O
EPG	B-Device
changed	O
the	O
service	O
provider	O
from	O
Zap2It	O
to	O
Rovi	O
.	O
</s>
<s>
Since	O
the	O
update	O
a	O
large	O
number	O
of	O
reports	O
have	O
been	O
posted	O
to	O
the	O
Microsoft	B-Device
Media	I-Device
Center	I-Device
Feedback	O
page	O
indicating	O
that	O
the	O
EPG	B-Device
data	O
feed	O
from	O
Rovi	O
has	O
significant	O
data	O
quality	O
issues	O
relating	O
to	O
incorrect	O
channel	O
lineups	O
,	O
outdated	O
and	O
incorrect	O
program	O
data	O
and	O
failure	O
to	O
download	O
the	O
EPG	B-Device
data	O
from	O
Rovi	O
through	O
Microsoft	O
's	O
servers	O
.	O
</s>
<s>
This	O
update	O
was	O
not	O
given	O
to	O
the	O
early	O
Insider	B-Application
Preview	I-Application
builds	O
of	O
Windows	B-Operating_System
10	I-Operating_System
even	O
though	O
they	O
included	O
the	O
WMC	O
.	O
</s>
<s>
Support	O
for	O
Electronic	B-Device
Program	I-Device
Guide	I-Device
service	O
officially	O
ended	O
on	O
January	O
14	O
,	O
2020	O
,	O
coinciding	O
with	O
the	O
end	O
of	O
support	O
for	O
Windows	B-Device
7	I-Device
.	O
</s>
<s>
This	O
applies	O
to	O
all	O
versions	O
of	O
WMC	O
including	O
users	O
running	O
WMC	O
on	O
discontinued	O
products	O
such	O
as	O
XP	O
and	O
Vista	B-Application
.	O
</s>
<s>
Despite	O
the	O
announcement	O
,	O
EPG	B-Device
data	O
continued	O
to	O
be	O
updated	O
until	O
the	O
first	O
week	O
of	O
April	O
2020	O
.	O
</s>
<s>
Alternatives	O
exist	O
that	O
acquire	O
program	O
information	O
and	O
load	O
it	O
into	O
the	O
WMC	O
EPG	B-Device
data	O
base	O
.	O
</s>
<s>
Some	O
DVR-like	O
alternatives	O
to	O
WMC	O
that	O
support	O
Program	B-Device
Guide	I-Device
Data	O
:	O
</s>
<s>
Media	O
Center	O
uses	O
TV	B-Device
tuner	I-Device
devices	I-Device
to	O
play	O
back	O
and	O
record	O
TV	O
shows	O
from	O
standard	O
antenna	O
,	O
cable	O
or	O
satellite	O
signals	O
.	O
</s>
<s>
Users	O
can	O
record	O
television	O
programs	O
manually	O
or	O
schedule	O
recording	O
via	O
the	O
electronic	B-Device
program	I-Device
guide	I-Device
.	O
</s>
<s>
Recordings	O
can	O
be	O
burned	O
to	O
Video	O
DVD	O
or	O
,	O
barring	O
copy	O
restrictions	O
,	O
be	O
transferred	O
to	O
a	O
portable	O
media	B-Device
player	I-Device
.	O
</s>
<s>
Media	O
Center	O
supports	O
both	O
analog	O
and	O
digital	O
tuners	B-Device
and	O
allows	O
up	O
to	O
six	O
of	O
each	O
tuner	O
type	O
(	O
analog	O
,	O
digital	O
terrestrial	O
,	O
Clear	O
QAM	B-Device
,	O
CableCard	B-Application
)	O
to	O
be	O
configured	O
.	O
</s>
<s>
All	O
the	O
tuners	B-Device
use	O
the	O
same	O
guide	O
data	O
but	O
it	O
can	O
be	O
edited	O
and	O
configured	O
to	O
include	O
additional	O
channels	O
such	O
as	O
Clear	O
QAM	B-Device
not	O
found	O
or	O
included	O
in	O
most	O
Titan	O
Guides	O
.	O
</s>
<s>
Media	O
Center	O
can	O
stream	O
both	O
live	O
and	O
recorded	O
contents	O
to	O
Windows	B-Device
Media	I-Device
Center	I-Device
Extenders	O
such	O
as	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
console	O
,	O
but	O
other	O
Windows	O
computers	O
can	O
just	O
access	O
recorded	O
content	O
.	O
</s>
<s>
Playback	O
of	O
content	O
on	O
television	O
is	O
possible	O
through	O
Media	O
Center	O
Extenders	O
or	O
by	O
directly	O
connecting	O
a	O
computer	O
running	O
Windows	B-Device
Media	I-Device
Center	I-Device
to	O
a	O
television	O
.	O
</s>
<s>
The	O
menus	O
of	O
Windows	B-Device
Media	I-Device
Center	I-Device
are	O
displayed	O
in	O
a	O
10-foot	B-General_Concept
user	I-General_Concept
interface	I-General_Concept
suitable	O
for	O
viewing	O
on	O
large	O
screen	O
televisions	O
and	O
can	O
be	O
navigated	O
using	O
various	O
remote	B-Protocol
controls	I-Protocol
.	O
</s>
<s>
Windows	B-Device
Media	I-Device
Center	I-Device
PCs	O
require	O
a	O
sensor	O
to	O
be	O
able	O
to	O
interact	O
with	O
the	O
remote	B-Protocol
control	I-Protocol
.	O
</s>
<s>
To	O
advertise	O
Media	O
Center	O
support	O
,	O
remote	B-Protocol
controls	I-Protocol
must	O
also	O
have	O
certain	O
buttons	O
such	O
as	O
the	O
Green	O
Media	O
Center	O
logo	O
Start	O
button	O
and	O
buttons	O
for	O
navigation	O
,	O
playback	O
and	O
volume	O
controls	O
,	O
power	O
and	O
channel	O
flipping	O
.	O
</s>
<s>
Windows	B-Device
Media	I-Device
Center	I-Device
organizes	O
and	O
displays	O
videos	O
and	O
music	O
found	O
on	O
both	O
local	O
and	O
networked	O
computers	O
.	O
</s>
<s>
Media	O
Center	O
allows	O
users	O
to	O
browse	O
pictures	O
and	O
play	O
them	O
in	O
slideshows	B-Application
,	O
as	O
well	O
as	O
play	O
video	O
files	O
.	O
</s>
<s>
Media	O
can	O
be	O
categorized	O
by	O
name	O
,	O
date	O
,	O
tags	B-General_Concept
,	O
and	O
other	O
file	O
attributes	O
.	O
</s>
<s>
In	O
addition	O
,	O
users	O
can	O
organize	O
and	O
play	O
films	O
through	O
the	O
"	O
Movie	O
Library	O
"	O
feature	O
introduced	O
in	O
Windows	B-Application
Vista	I-Application
Media	O
Center	O
.	O
</s>
<s>
Windows	B-Application
Vista	I-Application
Media	O
Center	O
introduced	O
support	O
for	O
CableCARD	B-Application
devices	O
.	O
</s>
<s>
However	O
,	O
CableCARD	B-Application
was	O
only	O
supported	O
on	O
OEM	O
hardware	O
that	O
had	O
been	O
certified	O
by	O
CableLabs	O
.	O
</s>
<s>
Windows	B-Device
7	I-Device
Media	O
Center	O
supports	O
adding	O
CableCARD	B-Application
to	O
existing	O
hardware	O
,	O
provided	O
the	O
hardware	O
meets	O
certain	O
requirements	O
.	O
</s>
<s>
Shortly	O
after	O
the	O
release	O
of	O
Windows	B-Device
7	I-Device
,	O
Microsoft	O
released	O
the	O
Digital	O
Cable	O
Advisor	O
tool	O
to	O
verify	O
that	O
the	O
requirements	O
are	O
met	O
before	O
activating	O
CableCARD	B-Application
support	O
.	O
</s>
<s>
Windows	B-Device
Media	I-Device
Center	I-Device
allows	O
synchronization	O
with	O
certain	O
portable	O
devices	O
.	O
</s>
<s>
These	O
devices	O
include	O
Windows	B-Operating_System
Mobile	I-Operating_System
Pocket	B-Device
PCs	I-Device
,	O
smartphones	B-Application
,	O
Portable	B-Operating_System
Media	I-Operating_System
Centers	I-Operating_System
and	O
other	O
players	O
that	O
can	O
sync	O
with	O
Windows	B-Device
Media	I-Device
Player	I-Device
.	O
</s>
<s>
Microsoft	O
's	O
Zune	B-Library
cannot	O
use	O
the	O
sync	O
function	O
,	O
but	O
can	O
play	O
Media	O
Center	O
recorder	O
TV	O
files	O
when	O
they	O
are	O
copied	O
to	O
a	O
Zune	B-Library
monitored	O
folder	O
.	O
</s>
<s>
While	O
synchronizing	O
television	O
shows	O
,	O
Windows	B-Device
Media	I-Device
Center	I-Device
encodes	O
the	O
shows	O
using	O
Windows	B-Protocol
Media	I-Protocol
Encoder	I-Protocol
to	O
a	O
Windows	B-Device
Media	I-Device
Video	I-Device
format	O
at	O
a	O
lower	O
quality	O
than	O
the	O
original	O
format	O
used	O
for	O
viewing	O
on	O
the	O
desktop	O
media	O
center	O
.	O
</s>
<s>
Windows	B-Device
Media	I-Device
Center	I-Device
was	O
designed	O
as	O
a	O
programmable	O
platform	O
;	O
other	O
programs	O
can	O
tie	O
into	O
the	O
Media	O
Center	O
UI	O
using	O
the	O
WMC	O
API	B-General_Concept
,	O
which	O
is	O
provided	O
as	O
a	O
managed	O
API	B-General_Concept
.	O
</s>
<s>
The	O
functionality	O
of	O
Windows	B-Device
Media	I-Device
Center	I-Device
can	O
be	O
extended	O
by	O
three	O
different	O
types	O
of	O
applications	O
:	O
</s>
<s>
These	O
are	O
managed	O
applications	O
written	O
using	O
the	O
WMC	O
API	B-General_Concept
and	O
packaged	O
as	O
CLI	O
assemblies	O
.	O
</s>
<s>
Presentation	O
Layer	O
applications	O
can	O
have	O
full	O
access	O
to	O
both	O
the	O
.NET	B-Application
Framework	I-Application
as	O
well	O
as	O
the	O
Windows	B-Device
Media	I-Device
Center	I-Device
API	B-General_Concept
,	O
with	O
the	O
latter	O
exposing	O
a	O
managed	O
object	B-Application
model	I-Application
to	O
access	O
and	O
manipulate	O
the	O
current	O
states	O
of	O
the	O
media	O
management	O
and	O
playback	O
,	O
live	O
television	O
,	O
video	O
recording	O
as	O
well	O
as	O
the	O
presentation	O
capabilities	O
of	O
Windows	B-Device
Media	I-Device
Center	I-Device
.	O
</s>
<s>
Presentation	O
Layer	O
applications	O
are	O
rendered	O
using	O
the	O
bitmap-based	O
Windows	B-Device
Media	I-Device
Center	I-Device
Presentation	O
Layer	O
,	O
the	O
user-input	O
and	O
presentation	O
system	O
of	O
WMC	O
.	O
</s>
<s>
Presentation	O
Layer	O
applications	O
can	O
be	O
streamed	O
over	O
RDP	B-Protocol
to	O
Windows	B-Device
Media	I-Device
Center	I-Device
Extenders	O
;	O
so	O
Presentation	O
Layer	O
applications	O
run	O
on	O
the	O
extenders	O
without	O
any	O
modification	O
.	O
</s>
<s>
Presentation	O
Layer	O
,	O
however	O
,	O
exists	O
only	O
in	O
the	O
Windows	B-Application
Vista	I-Application
version	I-Application
of	O
WMC	O
.	O
</s>
<s>
Presentation	O
Layer	O
applications	O
are	O
created	O
using	O
an	O
XML	B-Protocol
based	O
declarative	B-Language
markup	O
language	O
,	O
known	O
as	O
Media	O
Center	O
Markup	O
Language	O
(	O
MCML	O
)	O
.	O
</s>
<s>
MCML	O
is	O
used	O
to	O
define	O
the	O
user	B-Application
interface	I-Application
,	O
with	O
animation	O
,	O
text	O
input	O
,	O
navigation	O
,	O
data	O
binding	O
,	O
and	O
local	O
storage	O
support	O
available	O
from	O
the	O
markup	O
itself	O
.	O
</s>
<s>
Any	O
CLI	B-Language
language	I-Language
can	O
be	O
used	O
to	O
write	O
the	O
code-behind	O
assemblies	O
that	O
implement	O
the	O
required	O
functionality	O
.	O
</s>
<s>
However	O
,	O
in	O
the	O
latter	O
case	O
,	O
the	O
code	O
is	O
untrusted	O
;	O
only	O
the	O
.NET	B-Application
classes	O
that	O
are	O
marked	O
as	O
safe	O
for	O
use	O
by	O
Internet-originating	O
code	O
can	O
be	O
used	O
.	O
</s>
<s>
Before	O
an	O
application	O
can	O
be	O
used	O
,	O
it	O
has	O
to	O
be	O
registered	O
with	O
Windows	B-Device
Media	I-Device
Center	I-Device
.	O
</s>
<s>
An	O
application	O
can	O
either	O
register	O
itself	O
as	O
a	O
top-level	O
menu	O
item	O
,	O
in	O
any	O
of	O
the	O
sub-menus	O
(	O
depending	O
on	O
the	O
type	O
of	O
application	O
)	O
,	O
as	O
an	O
autoplay	O
handler	O
,	O
into	O
the	O
Program	O
Library	O
(	O
the	O
menu	O
category	O
for	O
all	O
programs	O
)	O
,	O
or	O
as	O
a	O
background	O
application	O
without	O
a	O
user	B-Application
interface	I-Application
running	O
as	O
long	O
as	O
a	O
WMC	O
session	O
continues	O
.	O
</s>
<s>
WMC	O
can	O
also	O
act	O
as	O
host	O
for	O
XAML	B-Application
Browser	I-Application
Applications	I-Application
(	O
XBAP	B-Application
)	O
,	O
which	O
are	O
rendered	O
in	O
the	O
WMC	O
UI	O
itself	O
.	O
</s>
<s>
XBAPs	B-Application
are	O
rendered	O
using	O
the	O
vector-based	O
resolution-independent	O
Windows	B-Device
Presentation	I-Device
Foundation	I-Device
component	O
of	O
.NET	B-Application
Framework	I-Application
3.0	O
.	O
</s>
<s>
XBAPs	B-Application
have	O
their	O
UI	O
written	O
in	O
XAML	B-Device
with	O
code	O
behind	O
in	O
any	O
.NET	B-Language
language	I-Language
.	O
</s>
<s>
XBAPs	B-Application
are	O
also	O
limited	O
to	O
Windows	B-Application
Vista	I-Application
.	O
</s>
<s>
WMC	O
provides	O
limited	O
support	O
for	O
streaming	O
XBAPs	B-Application
to	O
Windows	B-Device
Media	I-Device
Center	I-Device
Extenders	O
.	O
</s>
<s>
XBAPs	B-Application
have	O
been	O
declared	O
deprecated	O
in	O
Windows	B-Device
Media	I-Device
Center	I-Device
SDK	O
version	O
5.3	O
.	O
</s>
<s>
WMC	O
can	O
host	O
Internet	B-Application
Explorer	I-Application
within	O
its	O
own	O
UI	O
(	O
using	O
WMC	O
UI	O
widgets	O
)	O
and	O
can	O
display	O
web	O
pages	O
and	O
web	O
applications	O
.	O
</s>
<s>
This	O
feature	O
is	O
supported	O
in	O
both	O
Windows	O
XP	O
and	O
Windows	B-Application
Vista	I-Application
.	O
</s>
<s>
Web	O
applications	O
written	O
specifically	O
for	O
being	O
hosted	O
in	O
WMC	O
can	O
use	O
a	O
subset	O
of	O
the	O
WMC	O
API	B-General_Concept
which	O
is	O
exposed	O
via	O
JavaScript	B-Language
.	O
</s>
