A little bit confused. I have two questions:
1. Using Qt.4.7.2 and VS 2010, can you successfully build Vaa3D executable file?
2. Can you successfully build your plugin (generated the dll file) using Qt.4.7.2 and VS2010.

If both answers are yes, but you still cannot load your plugin, please send your plugin (dll file) to us for testing. At the same time, you can also check in your code, and we can try to build it on our end.

Thanks,

Zhi