Maybe because I don't have Visual Studio ?
I just wrote the code in notepad then copy-pasted it in the Code Lab Plug In (directly into Paint.NET). Nothing more involved.
Be sure I really don't want to bother anybody, just trying to get help to transform a raw prototype into something polished / finished so everybody can use it.
I have the feeling the learning curve of understanding / working with VS, installing templates, understanding wich part of the files to change, edit, add, how all the blocks should work together seems to me as it will take a long time... (time I've problem to find...)
Anyway, having some help on the GUI / DLL compilation is not a condition required to publish the code, I'll publish it anyway.
Another question: could such a plugin be of any interest ? Maybe another (better) one already exists ?