I downloaded http://www.gknw.net/mirror/curl/win32/curl-7.18.2-devel-mingw32.zip. (It's the "libcurl" link for Win32 at http://curl.haxx.se/download.html.)
Then I unzipped to C:\curl and added C:\curl\curl-7.18.2-devel-mingw32\bin to my path.

Next, downloaded the WWW::Curl-4.04 source from CPAN and extracted it to my usual build directory.
First up, in the Makefile.PL, I commented out the line requires_external_bin    'curl-config'; and added C:/curl/curl-7.18.2-devel-mingw32/include to @includes (as you had also done). Then it was a matter of running: 
perl Makefile.PL INC="-IC:/curl/curl-7.18.2-devel-mingw32/include" LIB
+S="-LC:/curl/curl-7.18.2-devel-mingw32/lib -lcurldll"

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followed by dmake test and dmake install A couple of the tests failed - but hopefully that's good enough for your purposes. The full build output can be viewed below my sig.

Update: The build I've done is a dynamic build. The libcurl binaries that I downloaded also included a static libcurl lib (libcurl.a), and it should be possible to build against that static lib instead of the dynamic lib. That should be achievable by replacing -lcurldll with -lcurl at the end of the above "Perl Makefile...." command. But I couldn't get that to work - I got about 30 errors relating to linking to libcurl of the type: 
Curl.o:Curl.c:(.text+0x30ce): undefined reference to `_imp__curl_easy_
+init'

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I think that's telling me that it's insisting on building against the dynamic lib. (I don't know why that is so - and I haven't gone looking for the answer.)

Cheers,
Rob 
C:\_32\comp\WWW-Curl-4.04>perl Makefile.PL INC="-IC:/curl/curl-7.18.2-
+devel-mingw32/include" LIBS="-LC:/curl/curl-7.18.2-devel-mingw32/lib 
+-lcurldll"
Set up gcc environment - 3.4.5 (mingw32 special)
'curl-config' is not recognized as an internal or external command,
operable program or batch file.
'curl-config' is not recognized as an internal or external command,
operable program or batch file.
'curl-config' is not recognized as an internal or external command,
operable program or batch file.
version is Found curl.h in C:/curl/curl-7.18.2-devel-mingw32/include/c
+url/curl.h

Building curlopt-constants.c for your libcurl version
Building Easy.pm constants for your libcurl version
Building Share.pm constants for your libcurl version
Checking if your kit is complete...
Looks good
Writing Makefile for WWW::Curl

C:\_32\comp\WWW-Curl-4.04>dmake test
Math::BigInt: couldn't load specified math lib(s), fallback to Math::B
+igInt::Fas
tCalc at C:/_32/ap1003/lib/Win32API/File.pm line 20
cp lib/WWW/Curl/Share.pm blib\lib\WWW\Curl\Share.pm
AutoSplitting blib\lib\WWW\Curl\Share.pm (blib\lib\auto\WWW\Curl\Share
+)
cp lib/WWW/Curl/Form.pm blib\lib\WWW\Curl\Form.pm
cp lib/WWW/Curl.pm blib\lib\WWW\Curl.pm
cp lib/WWW/Curl/Easy.pm blib\lib\WWW\Curl\Easy.pm
AutoSplitting blib\lib\WWW\Curl\Easy.pm (blib\lib\auto\WWW\Curl\Easy)
cp lib/WWW/Curl/Multi.pm blib\lib\WWW\Curl\Multi.pm
C:\_32\ap1003\bin\perl.exe "-Iinc" C:\_32\ap1003\lib\ExtUtils\xsubpp  
+-typemap C
:\_32\ap1003\lib\ExtUtils\typemap -typemap typemap  Curl.xs > Curl.xsc
+ && C:\_32
\ap1003\bin\perl.exe "-Iinc" -MExtUtils::Command -e mv Curl.xsc Curl.c
gcc -c  -IC:/curl/curl-7.18.2-devel-mingw32/include     -DNDEBUG -DWIN
+32 -D_CONS
OLE -DNO_STRICT -DHAVE_DES_FCRYPT -DUSE_SITECUSTOMIZE -DPRIVLIB_LAST_I
+N_INC -DPE
RL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -DUSE_PERLIO -DPERL_MSVCRT_REA
+DFIX -DHAS
ATTRIBUTE -fno-strict-aliasing -mms-bitfields -O2         -DVERSION=\"
+4.04\"
-DXS_VERSION=\"4.04\"  "-IC:\_32\ap1003\lib\CORE"   Curl.c
Running Mkbootstrap for WWW::Curl ()
C:\_32\ap1003\bin\perl.exe "-Iinc" -MExtUtils::Command -e chmod 644 Cu
+rl.bs
C:\_32\ap1003\bin\perl.exe "-Iinc" -MExtUtils::Mksymlists \
     -e "Mksymlists('NAME'=>\"WWW::Curl\", 'DLBASE' => 'Curl', 'DL_FUN
+CS' => {
}, 'FUNCLIST' => [], 'IMPORTS' => {  }, 'DL_VARS' => []);"
Set up gcc environment - 3.4.5 (mingw32 special)
dlltool --def Curl.def --output-exp dll.exp
g++ -o blib\arch\auto\WWW\Curl\Curl.dll -Wl,--base-file -Wl,dll.base -
+mdll -L"C:
\_32\ap1003\lib\CORE" Curl.o -Wl,--image-base,0x6d110000  C:\_32\ap100
+3\lib\CORE
\perl510.lib C:\curl\curl-7.18.2-devel-mingw32\lib\libcurldll.a C:\_32
+\mingw\lib
\libkernel32.a C:\_32\mingw\lib\libuser32.a C:\_32\mingw\lib\libgdi32.
+a C:\_32\m
ingw\lib\libwinspool.a C:\_32\mingw\lib\libcomdlg32.a C:\_32\mingw\lib
+\libadvapi
32.a C:\_32\mingw\lib\libshell32.a C:\_32\mingw\lib\libole32.a C:\_32\
+mingw\lib\
liboleaut32.a C:\_32\mingw\lib\libnetapi32.a C:\_32\mingw\lib\libuuid.
+a C:\_32\m
ingw\lib\libws2_32.a C:\_32\mingw\lib\libmpr.a C:\_32\mingw\lib\libwin
+mm.a C:\_3
2\mingw\lib\libversion.a C:\_32\mingw\lib\libodbc32.a C:\_32\mingw\lib
+\libodbccp
32.a C:\_32\mingw\lib\libmsvcrt.a dll.exp
dlltool --def Curl.def --base-file dll.base --output-exp dll.exp
g++ -o blib\arch\auto\WWW\Curl\Curl.dll -mdll -L"C:\_32\ap1003\lib\COR
+E" Curl.o
-Wl,--image-base,0x6d110000  C:\_32\ap1003\lib\CORE\perl510.lib C:\cur
+l\curl-7.1
8.2-devel-mingw32\lib\libcurldll.a C:\_32\mingw\lib\libkernel32.a C:\_
+32\mingw\l
ib\libuser32.a C:\_32\mingw\lib\libgdi32.a C:\_32\mingw\lib\libwinspoo
+l.a C:\_32
\mingw\lib\libcomdlg32.a C:\_32\mingw\lib\libadvapi32.a C:\_32\mingw\l
+ib\libshel
l32.a C:\_32\mingw\lib\libole32.a C:\_32\mingw\lib\liboleaut32.a C:\_3
+2\mingw\li
b\libnetapi32.a C:\_32\mingw\lib\libuuid.a C:\_32\mingw\lib\libws2_32.
+a C:\_32\m
ingw\lib\libmpr.a C:\_32\mingw\lib\libwinmm.a C:\_32\mingw\lib\libvers
+ion.a C:\_
32\mingw\lib\libodbc32.a C:\_32\mingw\lib\libodbccp32.a C:\_32\mingw\l
+ib\libmsvc
rt.a dll.exp
C:\_32\ap1003\bin\perl.exe "-Iinc" -MExtUtils::Command -e chmod 755 bl
+ib\arch\au
to\WWW\Curl\Curl.dll
C:\_32\ap1003\bin\perl.exe "-Iinc" -MExtUtils::Command -e cp Curl.bs b
+lib\arch\a
uto\WWW\Curl\Curl.bs
C:\_32\ap1003\bin\perl.exe "-Iinc" -MExtUtils::Command -e chmod 644 bl
+ib\arch\au
to\WWW\Curl\Curl.bs
C:\_32\ap1003\bin\perl.exe "-MExtUtils::Command::MM" "-e" "test_harnes
+s(0, 'inc'
, 'blib\lib', 'blib\arch')" t/*.t
t/00constants.............ok
t/01basic.................ok
t/02callbacks.............ok
t/04abort-test............ok
t/05progress..............ok
t/06http-post.............skipped
        all skipped: Not performing http POST/upload tests
t/07ftp-upload............skipped
        all skipped: Not performing ftp upload tests
t/08ssl...................ok
t/09times.................ok
t/10errbuf................ok
t/13slowleak..............skipped
        all skipped: Not performing slow leakage regression test
t/14duphandle.............dubious
        Test returned status 5 (wstat 1280, 0x500)
DIED. FAILED tests 11-17
        Failed 7/17 tests, 58.82% okay
t/15duphandle-callback....ok 15/25semi-panic: attempt to dup freed str
+ing at t/1
5duphandle-callback.t line 86 (#1)
    (S internal) The internal newSVsv() routine was called to duplicat
+e a
    scalar that had previously been marked as free.

Undefined subroutine &main:: called at t/15duphandle-callback.t line 8
+6.
# Looks like you planned 25 tests but only ran 18.
# Looks like your test died just after 18.
t/15duphandle-callback....dubious
        Test returned status 255 (wstat 65280, 0xff00)
DIED. FAILED tests 19-25
        Failed 7/25 tests, 72.00% okay
t/16formpost..............skipped
        all skipped: Not performing POST
t/17slist.................skipped
        all skipped: Not performing printenv cgi tests
t/18twinhandles...........ok
t/meta....................skipped
        all skipped: Test::CPAN::Meta required for testing META.yml
t/pod-coverage............skipped
        all skipped: Test::Pod::Coverage 1.04 required for testing POD
+ coverage
t/pod.....................skipped
        all skipped: Test::Pod 1.14 required for testing POD
Failed Test              Stat Wstat Total Fail  List of Failed
----------------------------------------------------------------------
+---------
t/14duphandle.t             5  1280    17   14  11-17
t/15duphandle-callback.t  255 65280    25   14  19-25
8 tests skipped.
Failed 2/19 test scripts. 14/152 subtests failed.
Files=19, Tests=152, 244 wallclock secs ( 0.00 cusr +  0.00 csys =  0.
+00 CPU)
Failed 2/19 test programs. 14/152 subtests failed.
dmake:  Error code 255, while making 'test_dynamic'

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In reply to Re^6: Install WWW::Curl by syphilis
in thread Install WWW::Curl by jai_dgl

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