<s>
Windows	B-Application
App	I-Application
SDK	I-Application
(	O
formerly	O
known	O
as	O
Project	B-Application
Reunion	I-Application
)	O
is	O
a	O
software	B-Application
development	I-Application
kit	I-Application
(	O
SDK	O
)	O
from	O
Microsoft	O
that	O
targets	O
the	O
development	O
of	O
native	B-Library
desktop	I-Library
applications	I-Library
on	O
Windows	B-Application
11	I-Application
and	O
Windows	O
10	O
back	O
to	O
version	O
1809	O
.	O
</s>
<s>
Windows	B-Application
App	I-Application
SDK	I-Application
does	O
not	O
replace	O
the	O
Windows	B-Application
SDK	I-Application
;	O
it	O
is	O
designed	O
to	O
enhance	O
native	O
Win32	B-Library
(	O
USER32/GDI32	O
)	O
and	O
.NET	B-Application
6	I-Application
(	O
WPF/WinForms	O
)	O
applications	O
,	O
and	O
migrate	O
existing	O
UWP	B-Device
apps	O
to	O
Win32	B-Library
or	O
.NET	B-Application
model	O
by	O
providing	O
a	O
common	O
application	B-Application
programming	I-Application
interface	I-Application
(	O
API	B-Application
)	O
based	O
on	O
UWP/WinRT	O
and	O
WinMD	O
metadata	O
,	O
to	O
bridge	O
the	O
gap	O
between	O
low-level	O
system	O
access	O
in	O
Win32	B-Library
APIs	I-Library
and	O
high-level	O
programming	O
concepts	O
in	O
.NET	B-Application
and	O
UWP	B-Device
.	O
</s>
<s>
As	O
of	O
version	O
1.0	O
,	O
SDK	O
components	O
include	O
WinUI	B-Language
3	I-Language
,	O
WebView	O
2	O
,	O
MSIX-Core	O
,	O
and	O
C++	B-Language
/WinRT	I-Language
,	O
Rust/WinRT	O
and	O
C#	B-Application
/WinRT	O
language	O
bindings	O
.	O
</s>
<s>
An	O
API	B-Application
abstracting	O
USER32/GDI32	O
primitives	O
known	O
as	O
AppWindow	O
was	O
introduced	O
to	O
expose	O
a	O
unified	O
set	O
of	O
windowing	O
capabilities	O
.	O
</s>
<s>
The	O
feature	O
roadmap	O
for	O
version	O
1.1	O
includes	O
"	O
modern	O
windowing	O
"	O
in	O
WinUI	B-Language
3	I-Language
,	O
supporting	O
multiple	O
client	O
windows	O
and	O
custom	O
window	O
controls	O
.	O
</s>
<s>
There	O
are	O
plans	O
to	O
add	O
to	O
the	O
Windows	B-Application
App	I-Application
SDK	I-Application
.	O
</s>
