<s>
windows.h	B-Language
is	O
a	O
Windows-specific	O
header	O
file	O
for	O
the	O
C	B-Language
and	O
C++	B-Language
programming	I-Language
languages	I-Language
which	O
contains	O
declarations	O
for	O
all	O
of	O
the	O
functions	O
in	O
the	O
Windows	B-Library
API	I-Library
,	O
all	O
the	O
common	O
macros	O
used	O
by	O
Windows	B-Application
programmers	O
,	O
and	O
all	O
the	O
data	O
types	O
used	O
by	O
the	O
various	O
functions	O
and	O
subsystems	O
.	O
</s>
<s>
It	O
defines	O
a	O
very	O
large	O
number	O
of	O
Windows	B-Application
specific	O
functions	O
that	O
can	O
be	O
used	O
in	O
C	B-Language
.	O
The	O
Win32	B-Library
API	I-Library
can	O
be	O
added	O
to	O
a	O
C	B-Language
programming	I-Language
project	O
by	O
including	O
the	O
windows.h	B-Language
header	O
file	O
and	O
linking	O
to	O
the	O
appropriate	O
libraries	O
.	O
</s>
<s>
To	O
use	O
functions	O
in	O
xxxx.dll	O
,	O
the	O
program	O
must	O
be	O
linked	O
to	O
xxxx.lib	O
(	O
or	O
libxxxx.dll.a	O
in	O
MinGW	B-Application
)	O
.	O
</s>
<s>
Some	O
headers	O
are	O
not	O
associated	O
with	O
a	O
.dll	O
but	O
with	O
a	O
static	B-Library
library	I-Library
(	O
e.g.	O
</s>
<s>
There	O
are	O
a	O
number	O
of	O
child	O
header	O
files	O
that	O
are	O
automatically	O
included	O
with	O
windows.h.	O
</s>
<s>
windows.h	B-Language
may	O
include	O
any	O
of	O
the	O
following	O
header	O
files	O
:	O
</s>
<s>
Several	O
macros	O
affect	O
the	O
behavior	O
of	O
windows.h.	O
</s>
<s>
UNICODE	O
when	O
defined	O
,	O
this	O
causes	O
TCHAR	O
to	O
be	O
a	O
synonym	O
of	O
WCHAR	B-Language
instead	O
of	O
CHAR	O
,	O
and	O
all	O
type-generic	O
API	O
functions	O
and	O
messages	O
that	O
work	O
with	O
text	O
will	O
be	O
defined	O
to	O
the	O
-W	O
versions	O
instead	O
of	O
the	O
-A	O
versions	O
.	O
</s>
<s>
(	O
It	O
is	O
similar	O
to	O
the	O
windows	B-Application
C	B-Language
runtime	O
's	O
_UNICODE	O
macro	O
.	O
)	O
</s>
<s>
RC_INVOKED	O
defined	O
when	O
the	O
resource	O
compiler	O
(	O
RC.EXE	O
)	O
is	O
in	O
use	O
instead	O
of	O
a	O
C	B-Language
compiler	O
.	O
</s>
<s>
Define	O
it	O
to	O
0x0501	O
for	O
Windows	B-Application
XP	I-Application
,	O
and	O
0x0600	O
for	O
Windows	B-Application
Vista	I-Application
.	O
</s>
<s>
Excludes	O
things	O
like	O
cryptography	O
,	O
DDE	B-Operating_System
,	O
RPC	B-Operating_System
,	O
the	O
Windows	B-Application
Shell	I-Application
and	O
Winsock	B-Application
.	O
</s>
