Ruby C extension not resolving 3rd party dlls at runtime

I have a Ruby C extension that is providing a ruby interface to use a third part C library. I am able to build the library, let's call it something.so just fine. However, it's compiled against the third party .lib and .dll files dynamically.

When I actually try to run a ruby script that has

require 'somet开发者_如何学Gohing'

it fails. Ruby doesn't know how to find the DLLs the something.so was linked against. It gives me an error like:

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ruby.exe - System Error
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The program can't start because SomeThirdParty.dll is missing from your computer. Try    reinstalling the program to fix this problem. 
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OK   
---------------------------

What do I need to do to tell ruby how to find this dll? If I put all the third party dlls in the same directory as the ruby script I'm running it works, but I'd rather not do that.

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Just put it in a place that is inside your PATH. A good place may be the ruby\bin directory.