The procedure entry point snprintf could not be located in the dynamic link library msvcrt-ruby191.dll

is encountered when executing:
require 'gl'

Output: irb(main):011:0> require 'gl'
LoadError: 127: The specified procedure could not be found.   - C:/Ruby191/lib/r
uby/gems/1.9.1/gems/ruby-opengl-0.60.1-x86-mswin32/lib/gl.so
        from (irb):11:in `require'
        from (irb):11
        from C:/Ruby191/bin/irb:12:in `<main>'
irb(main):012:0>

This reproducible on Windows installs of Ruby 1.9.1-pX and Ruby 1.9.2-pX

Please assist in resolving.

Date: 2011-06-18 06:35
Sender: Todd Moyer

Possible solution found here:

http://www.eggheadcafe.com/microsoft/Ruby/36295487/rubyopeng
l-new
-glso.aspx

Apparently, there is something wrong with gl.so

The recompiled version provided on the above page worked for 
me.