Going to read 'C:\Perl\cpan\Metadata'
  Database was generated on Mon, 15 Mar 2010 22:00:44 GMT
Running install for module 'Lab::VISA'
Running make for S/SC/SCHROEER/Lab/Lab-VISA-1.12.tar.gz
Checksum for C:\Perl\cpan\sources\authors\id\S\SC\SCHROEER\Lab\Lab-VIS
+A-1.12.tar.gz ok
Lab-VISA-1.12/
Lab-VISA-1.12/README
Lab-VISA-1.12/MANIFEST
Lab-VISA-1.12/visa.i
Lab-VISA-1.12/META.yml
Lab-VISA-1.12/visa_wrap.cxx
Lab-VISA-1.12/VISA.pod
Lab-VISA-1.12/Makefile.PL
Lab-VISA-1.12/t/
Lab-VISA-1.12/t/1.t
Lab-VISA-1.12/Tutorial/
Lab-VISA-1.12/Tutorial/example3.pl
Lab-VISA-1.12/Tutorial/example5.pl
Lab-VISA-1.12/Tutorial/example1.pl
Lab-VISA-1.12/Tutorial/example2.pl
Lab-VISA-1.12/Tutorial/example4.pl
Lab-VISA-1.12/Tutorial/example6.pl
Lab-VISA-1.12/Tutorial/Talk/
Lab-VISA-1.12/Tutorial/Talk/lab-measurement/
Lab-VISA-1.12/Tutorial/Talk/lab-measurement/lab-measurement.pl
Lab-VISA-1.12/Tutorial/Talk/real-world/
Lab-VISA-1.12/Tutorial/Talk/real-world/ladediagramm_qpc.pl
Lab-VISA-1.12/Tutorial/Talk/lab-instrument/
Lab-VISA-1.12/Tutorial/Talk/lab-instrument/make_sweep.pl
Lab-VISA-1.12/Tutorial/Talk/lab-instrument/query_id.pl
Lab-VISA-1.12/Tutorial/Talk/Lab-VISA.ppt
Lab-VISA-1.12/Tutorial/Talk/goodbye/
Lab-VISA-1.12/Tutorial/Talk/goodbye/goodbye.pl
Lab-VISA-1.12/Tutorial/Talk/lab-visa/
Lab-VISA-1.12/Tutorial/Talk/lab-visa/raw_visa.pl
Lab-VISA-1.12/VISA.pm
Lab-VISA-1.12/lib/
Lab-VISA-1.12/lib/Lab/
Lab-VISA-1.12/lib/Lab/VISA/
Lab-VISA-1.12/lib/Lab/VISA/Tutorial.pod
Lab-VISA-1.12/visadef.i

  CPAN.pm: Going to build S/SC/SCHROEER/Lab/Lab-VISA-1.12.tar.gz

Checking if your kit is complete...
Looks good
Writing Makefile for Lab::VISA
cp lib/Lab/VISA/Tutorial.pod blib\lib\Lab\VISA\Tutorial.pod
cp VISA.pod blib\lib\Lab\VISA.pod
cp VISA.pm blib\lib\Lab\VISA.pm
    cl -c  -IC:\VXIPNP\WinNT\include "-ID:\Microsoft Platform SDK\Incl
+ude"  -nologo -GF -W3 -MD -Zi -DNDEBUG -O1 -DWIN32 -D_CONSOLE -DNO_ST
+RICT -DHAVE_DES_FCRYPT -DUSE_SITECUSTOMIZE -DPRIVLIB_LAST_IN_INC -DPE
+RL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -DUSE_PERLIO -DPERL_MSVCRT_RE
+ADFIX -MD -Zi -DNDEBUG -O1    -DVERSION=\"1.12\"  -DXS_VERSION=\"1.12
+\"  "-IC:\Perl\lib\CORE"   visa_wrap.cxx
visa_wrap.cxx
visa_wrap.cxx(1203) : error C2159: more than one storage class specifi
+ed
visa_wrap.cxx(1203) : warning C4518: 'typedef ' : storage-class or typ
+e specifier(s) unexpected here; ignored
visa_wrap.cxx(1203) : warning C4502: 'linkage specification' requires 
+use of keyword 'extern' and must precede all other specifiers
visa_wrap.cxx(1204) : error C2143: syntax error : missing ';' before '
+*'
visa_wrap.cxx(1204) : error C2378: 'SwigPerlWrapper' : redefinition; s
+ymbol cannot be overloaded with a typedef
        visa_wrap.cxx(1203) : see declaration of 'SwigPerlWrapper'
visa_wrap.cxx(1204) : error C2501: 'SwigPerlWrapperPtr' : missing stor
+age-class or type specifiers
visa_wrap.cxx(1209) : error C2146: syntax error : missing ';' before i
+dentifier 'wrapper'
visa_wrap.cxx(1209) : error C2501: 'SwigPerlWrapperPtr' : missing stor
+age-class or type specifiers
visa_wrap.cxx(1209) : error C2501: 'wrapper' : missing storage-class o
+r type specifiers
visa_wrap.cxx(2318) : error C2078: too many initializers
visa_wrap.cxx(2556) : error C2039: 'wrapper' : is not a member of 'swi
+g_command_info'
        visa_wrap.cxx(1207) : see declaration of 'swig_command_info'
  SCHROEER/Lab/Lab-VISA-1.12.tar.gz
  C:\PROGRA~1\MICROS~3\VC98\bin\nmake.exe -- NOT OK
Running make test
  Can't test without successful make
Running make install
  Make had returned bad status, install seems impossible
[download]

That looks to me as if the (SWIG-generated) wrapper for that library is not what your C compiler expects it to be, but that's unfortunately outside of my expertise. There also is no ActiveState build of that module, but the README distributed with Lab::VISA points out a PPM maintained by the author.

Do you have an idea what can I do in order to make this through?