I can see that there is still a lot of topics at wxWidgets forums related to usage of shared libs or plugins with wxWidgets apps on different platform.
For Windows it's not hard to implement such app but on Linux and OS X this may be quite tricky (especially when you are not planning to use…
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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:
Taking screenshots is a very common task and it was a must for one of my current projects. What was a surprise when I understood that my favourite toolkit can't do that in cross-platform manner.
It is official bug that wxScreenDC does not work properly under Mac OS and you can't use Blit() message for copying screen onto wxMemoryDC.
After digging the Internet I found a kind of solution which used OpenGL and created wxWidgets-based class which takes screenshots also under Mac OS. It was really hard task for me because I haven't used neither Carbon nor Cocoa before. However everything works now and I'm happy.
Here it is:
http://code.google.com/p/axtk/