<s>
Microsoft	B-Protocol
Help	I-Protocol
Viewer	I-Protocol
(	O
HV	O
)	O
is	O
the	O
offline	O
help	B-Protocol
system	I-Protocol
(	O
local	O
help	O
)	O
developed	O
by	O
Microsoft	O
that	O
ships	O
with	O
versions	O
of	O
Microsoft	B-Application
Windows	I-Application
including	O
and	O
subsequent	O
to	O
Windows	B-Application
8	I-Application
,	O
as	O
well	O
as	O
Visual	B-Application
Studio	I-Application
2010	I-Application
and	O
its	O
associated	O
MSDN	O
Library	O
.	O
</s>
<s>
Microsoft	B-Protocol
Help	I-Protocol
Viewer	I-Protocol
1.x	O
supersedes	O
Microsoft	B-Protocol
Help	I-Protocol
2	I-Protocol
which	O
is	O
the	O
help	B-Protocol
system	I-Protocol
used	O
by	O
Microsoft	B-Application
Visual	I-Application
Studio	I-Application
2002/2003/2005/2008	O
and	O
Office	B-Application
2007	I-Application
.	O
</s>
<s>
Microsoft	B-Protocol
Help	I-Protocol
Viewer	I-Protocol
2.x	O
is	O
backwards-compatible	O
with	O
1.x	O
and	O
is	O
shipped	O
with	O
the	O
operating	O
system	O
as	O
well	O
as	O
VS	O
2012+	O
.	O
</s>
<s>
Although	O
Microsoft	B-Protocol
Help	I-Protocol
Viewer	I-Protocol
was	O
referred	O
to	O
as	O
MS	O
Help	O
3.x	O
during	O
development	O
,	O
it	O
is	O
a	O
wholly	O
new	O
product	O
and	O
technically	O
unrelated	O
to	O
Microsoft	B-Protocol
Help	I-Protocol
2	I-Protocol
.	O
</s>
<s>
With	O
the	O
growing	O
need	O
for	O
a	O
general	O
Unicode-based	O
help	B-Protocol
system	I-Protocol
,	O
has	O
become	O
the	O
default	O
help	B-Protocol
system	I-Protocol
for	O
Windows	B-Operating_System
10	I-Operating_System
.	O
</s>
<s>
Jan	O
2008	O
-	O
April	O
Reagan	O
[	O
MS	O
PM ]	O
blogs	O
that	O
Microsoft	O
will	O
replace	O
Microsoft	B-Protocol
Help	I-Protocol
2	I-Protocol
.	O
</s>
<s>
Apr	O
2009	O
-	O
At	O
WritersUA	O
2009	O
conference	O
April	O
Reagan	O
and	O
Anand	O
Raman	O
announced	O
Microsoft	B-Protocol
Help	I-Protocol
3	I-Protocol
will	O
ship	O
with	O
Visual	B-Application
Studio	I-Application
2010	I-Application
.	O
</s>
<s>
April	O
2010	O
-	O
Microsoft	B-Protocol
Help	I-Protocol
Viewer	I-Protocol
1.0	O
is	O
RTM	O
(	O
Release	O
to	O
Manufacturing	O
)	O
as	O
part	O
of	O
the	O
Visual	B-Application
Studio	I-Application
2010	I-Application
release	O
.	O
</s>
<s>
March	O
2011	O
-	O
Microsoft	B-Protocol
Help	I-Protocol
Viewer	I-Protocol
1.1	O
ships	O
with	O
Service	O
Pack	O
1	O
of	O
Visual	B-Application
Studio	I-Application
2010	I-Application
.	O
</s>
<s>
August	O
2012	O
-	O
Microsoft	B-Protocol
Help	I-Protocol
Viewer	I-Protocol
2.0	O
ships	O
with	O
Visual	B-Application
Studio	I-Application
2012	O
and	O
the	O
Windows	B-Application
8	I-Application
OS	I-Application
.	O
</s>
<s>
The	O
HelpPane	O
Viewer	O
is	O
found	O
in	O
Windows	B-Operating_System
10	I-Operating_System
.	O
</s>
<s>
The	O
user	B-Application
experience	I-Application
for	O
Microsoft	B-Protocol
Help	I-Protocol
Viewer	I-Protocol
1.x	O
is	O
that	O
topics	O
can	O
be	O
viewed	O
in	O
any	O
installed	O
web	B-Application
browser	I-Application
–	O
a	O
separate	O
application	O
,	O
such	O
as	O
the	O
Microsoft	O
Document	O
Explorer	O
included	O
with	O
Microsoft	B-Protocol
Help	I-Protocol
2	I-Protocol
,	O
is	O
not	O
necessary	O
.	O
</s>
<s>
The	O
browser-based	O
model	O
is	O
meant	O
to	O
provide	O
a	O
more	O
lightweight	O
navigation	O
,	O
downloading	O
,	O
and	O
reading	O
experience	O
than	O
earlier	O
help-viewer	O
models	O
.	O
</s>
<s>
Visual	B-Application
Studio	I-Application
2010	I-Application
includes	O
a	O
taskbar	O
applet	O
in	O
the	O
Windows	O
notification	O
area	O
(	O
system	O
tray	O
)	O
that	O
arbitrates	O
between	O
viewing	O
offline	O
help	O
and	O
online	B-Protocol
help	I-Protocol
in	O
the	O
browser	B-Application
when	O
F1	O
is	O
pressed	O
,	O
and	O
resolves	O
help	O
topic	O
URIs	B-Protocol
to	O
the	O
proper	O
topic	O
page	O
.	O
</s>
<s>
It	O
also	O
includes	O
a	O
"	O
library	O
manager	O
"	O
application	O
to	O
manage	O
the	O
download	O
,	O
installation	O
and	O
uninstallation	O
of	O
help	O
topics	O
on	O
the	O
system	O
,	O
as	O
well	O
as	O
whether	O
to	O
prefer	O
online	B-Protocol
help	I-Protocol
when	O
connected	O
to	O
the	O
Internet	O
.	O
</s>
<s>
Microsoft	B-Protocol
Help	I-Protocol
Viewer	I-Protocol
2.0	O
uses	O
a	O
COM	O
runtime	O
library	O
,	O
so	O
the	O
taskbar	O
applet	O
is	O
no	O
longer	O
used	O
.	O
</s>
<s>
The	O
runtime	O
API	O
is	O
accessible	O
via	O
.NET	O
dlls	O
used	O
in	O
VS2012	O
and	O
Windows	B-Application
8	I-Application
;	O
they	O
are	O
equivalent	O
except	O
for	O
a	O
name	O
change	O
.	O
</s>
<s>
VS2012	O
ships	O
a	O
more	O
sophisticated	O
toolkit	O
(	O
HlpViewer	O
and	O
HlpCtntMgr	O
)	O
,	O
while	O
Windows	B-Application
8	I-Application
only	O
has	O
a	O
one-pane	O
HelpPane	O
program	O
.	O
</s>
<s>
Help	B-Protocol
files	I-Protocol
from	O
Microsoft	B-Protocol
Help	I-Protocol
Viewer	I-Protocol
have	O
a	O
file	O
extension	O
.	O
</s>
<s>
They	O
are	O
ordinary	O
Zip	B-General_Concept
files	I-General_Concept
containing	O
HTML	O
documents	O
.	O
</s>
