If you take a look at the example Dev-C++ plug-in in the interface library download, you'll get the idea.
You need a resource file (*.rc) containing your string resources, and add it to your project. You might also need to instruct the IDE to compile the file into your app - instructions on this are in the 'Using ...' file I included in the download.
*** Coming soon - Network Plug-in - Check my site for info ***
For free Plug-ins, source and the Interface library for Visual C++ 6, .NET and now for Dev-C++
http://www.matrix1.demon.co.uk