Help for Beginner - Compiling C Extension on Windows

PS C:\rails\ext_test\stree\ext\stree> ruby -v
ruby 1.8.7 (2010-08-16 patchlevel 302) [i386-mingw32]

PS C:\rails\ext_test\stree\ext\stree> gcc --version
The term 'gcc' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spellin
g of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:4
+ gcc <<<<  --version
    + CategoryInfo          : ObjectNotFound: (gcc:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException