nmake apache include error

[blink416]

im new to c and apache, and am trying to compile the sspi apache .so module (in windows), but am getting the fatal error below.

    cl /nologo /W3 /WX /LD /MT /Ot /Ox /Oi /Oy /Ob2 /GF /Gy /I "E:\inventions\xlib\ssp
i\branches\ennio\include" /I "E:\inventions\xlib\httpd-2.2.19\include" /I "E:\inventions\x
lib\httpd-2.2.19\srclib\apr\include" /I "E:\inventions\xlib\httpd-2.2.19\srclib\apr-util\i
nclude" /I "E:\inventions\xlib\httpd-2.2.19\os\win32" /I "C:\Program Files\Microsoft SDKs\
Windows\v7.0A\Include" /I "C:\Program Files\Microsoft Visual Studio 10.0\VC\include" /D WI
N32 /c /FoE:\inventions\xlib\sspi\branches\ennio\Release\ E:\inventions\xlib\sspi\branches
\ennio\src\mod_auth_sspi.c
mod_auth_sspi.c
E:\inventions\xlib\httpd-2.2.19\include\ap_config.h(25) : fatal error C1083: Cannot open i
nclude file: 'apr.h': No such file or directory
NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual Studio 10.0\VC\BIN\cl.EXE"'
 : return code '0x2'
Stop.

i understand apr.h is in a package somewhere, but how do i make it available? (

http://techstack.com/forum/apache/45...ere-apr-h.html)

also, E:\inventions\xlib\httpd-2.2.19 contains the source code for apache, i have not tried to compile or install apache in any way: is that necessary for the includes to work?

ive been trying figure out how to build this one module for a while, any help would be much appreciated.