cloc is an excellent commandline, Perl-based, Windows-executable which will break down the blank lines, commented lines, and source lines of code, grouped by file-formats.
Now it won't specifically run on a VS solution file, but it can recurse through directories, and you can set up filename filters as you see fit.
Here's the sample output from their web page:
prompt> cloc perl-5.10.0.tar.gz 4076 text files. 3883 unique files. 1521 files ignored. http://cloc.sourceforge.net v 1.07 T=10.0 s (251.0 files/s, 84566.5 lines/s) ------------------------------------------------------------------------------- Language files blank comment code scale 3rd gen. equiv ------------------------------------------------------------------------------- Perl 2052 110356 112521 309778 x 4.00 = 1239112.00 C 135 18718 22862 140483 x 0.77 = 108171.91 C/C++ Header 147 7650 12093 44042 x 1.00 = 44042.00 Bourne Shell 116 3402 5789 36882 x 3.81 = 140520.42 Lisp 1 684 2242 7515 x 1.25 = 9393.75 make 7 498 473 2044 x 2.50 = 5110.00 C++ 10 312 277 2000 x 1.51 = 3020.00 XML 26 231 0 1972 x 1.90 = 3746.80 yacc 2 128 97 1549 x 1.51 = 2338.99 YAML 2 2 0 489 x 0.90 = 440.10 DOS Batch 11 85 50 322 x 0.63 = 202.86 HTML 1 19 2 98 x 1.90 = 186.20 ------------------------------------------------------------------------------- SUM: 2510 142085 156406 547174 x 2.84 = 1556285.03 -------------------------------------------------------------------------------
The third generation equivalent scale is a rough estimate of how much code it would take in a third generation language. Not terribly useful, but interesting anyway.