[CONNECT C++] Finding TextTable Seeds in DGNLibs

TextTable seeds are stored in your DGNLibs. If you want to find a TextTable seed programmatically, you must...

1. Enumerate the available DGNLibs (each DGNLib is a DGN file)
2. Enumerate the models in each DGNLib
3. Test whether the model is a TextTable seed.

The TextTable seed test is simple: the DGN model must contain exactly one element, and that element must be a TextTable.  Putting that altogether, I've written an article about Finding TextTable Seeds using C++.