In one of my current projects I had to implement client-server communication and protection by MAC address when client machine can't connect to server if its MAC address is not allowed, regardless of network or broadband connection. But what was a surprise that wxWidgets does not have API which allows obtaining MAC address in cross-platform way. So, I decided to write a small class which allows obtainig MAC address for Windows, Linux, Mac OS and Windows Mobile. Here it is:
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