Or just get and read the plugin dev docs and use any handy text editor
The source is there as well as examples. You would probably be better off checking out the python source of some other edit plugins.
Sorry I never use VS so I can't help you with that.
The majority of the plugin source code can be found here:
https://github.com/Sigil-Ebook/Sigil...unchers/python
And the C++ routine to interface with it is in Sigil/src/Dialogs/PluginRunner.cpp in case you are interested in how the interface actually works, but everything you really need to know can be found in the Sigil Plugin Framework guide:
https://github.com/Sigil-Ebook/Sigil...ork_rev14.epub