[R] dlls

[Ben.Flood]

Hi,
	I am trying to run an algorithm in a large dataset and want to speed
this process up by using C/C++ functions.  I have been attempting to create
a dll library using Microsoft Visual C++ in Windows and call that using
dyn.load("file.dll") but when I use is.loaded("function") I invariably get
FALSE.  
	If anybody has done this and could give me more detailed
instructions it would be very much appreciated,
	best regards.