Extract a list of codes from data

I've got data such as the following:

Resources Nl Materials0.0000ACSC:\Stocks\All Acrux Limited Pharmaceuticals0.0000ACRC:\Stocks\All Adamus Resources Limited Materials-2.5317ADUC:\Stocks\All Adelaide Brighton Limited Materials2.4242ABCC:\Stocks\All Aditya Birla Minerals Limited Materials1.1236ABYC:\Stocks\All Advanced Braking Technolo Automobile & Co3.5714ABVC:\Stocks\All Advanced....

and I want to extract a list of the three-letter alphabetic codes which appear directly to the left of every 'C:\' symbol - anyone know a formula or VBA code which could do this please? Thanks in advance.