DLL modules with other dependent libraries

Hi all,

In R for Windows, is there a preferred way to handle R extensions that 
provide native code that depend upon one or more third party DLLs?  If I 
put those DLLs in the library/MODULE/libs it doesn't find them.  In 
other words, my MODULE.dll has other DLLs it uses, but they aren't 
standard and it would be unlikely to find them in the system path. 

Thanks for any suggestions!