1. If you follow the instruction from https://github.com/Vaa3D/Vaa3D_Wiki/wiki/Build-Vaa3D-on-Windows-%28VS2010-and-QMake%29, you should be able to build Vaa3D. You cannot use Qt for VS2008 build on VS2010. So you HAVE to use the Qt suggested from the instruction website.
If the error is "cannot find demo_shared.lib", you can try to locate this file and add your file path to your project.

2. The attachment dose not include any information about your own plugin. Please send your plugin (the dll file) for us to test.

Zhi