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Two ways to do what the OP is asking. 1. VI Server world: Children have a static link to their parents and Parents have a dynamic link to their children. This means that once a class is loaded into memory, the parent knows about the child. According to the documentation this will NOT work in the runtime environment, but i've used this several times when making IDE Tools. 2. Runtime Reflection: The following code will also give you an array of all of the children loaded in memory, but this time it uses less VI Server so it will work in the runtime environment. I use this when using a plugin architecture. I've not done a lot of performance testing with it, but on a medium-ish size project (one with ~150 classes) it only takes about 50 ms to run, so it's worked well for me so far. Having given you those solutions, I still think your best bet is to use a statically defined array. This will ensure things are loaded into memory when their needed and such. My solutions really only become worth it once you're dynamically loading classes.