I have downloaded win32serial-0.5 and am trying to install in a Windows
XP machine.  The readme file list the following steps:
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[How to install]
1. unzip win32serial-x.x.zip
2. ruby extconf.rb
3. make (or nmake)
4. make install
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>From a WindowsCommand prompt:
Steps 1. and 2. are no problem.
Step 3 gives me an error:
'make' is not recognized as an internal or external command,
operable program or batch file.

Please help.  I could do what I need to do in Visual Basic, but am
trying to convert to Ruby and REALLY want to go with Ruby.