Checking if your kit is complete...
Looks good
Writing Makefile for Win32::Process::List
cp processes.pl blib/lib/Win32/Process/processes.pl
cp List.pm blib/lib/Win32/Process/List.pm
AutoSplitting blib/lib/Win32/Process/List.pm (blib/lib/auto/Win32/Process/List)
/export/home/cpanrun/build/5.6.1/bin/perl -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi -I/export/home/cpanrun/build/5.6.1/lib/5.6.1 /export/home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/xsubpp  -typemap /export/home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/typemap List.xs > List.xsc && mv List.xsc List.c
Please specify prototyping behavior for List.xs (see perlxs manual)
gcc -c  -DUSE_REENTRANT_API -D_POSIX_PTHREAD_SEMANTICS -D_REENTRANT -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O   -DVERSION=\"0.09\" -DXS_VERSION=\"0.09\" -fPIC -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi/CORE  List.c
List.xs:4: windows.h: No such file or directory
List.xs:5: tlhelp32.h: No such file or directory
make: *** [List.o] Error 1