@SGaist @aha_1980 Yeah, I thought of "low level" plugins anyway, as I don't want to extend Qt ifself, but a user application with my widget library. @SGaist said in Qt Widget Library vs. Qt Plugin advice: That said, if your goal is to provide a set of widgets for other to use in their application (such as the widgets module), then there's no need for plugins. Ok, I'll try a plain shared library and see how it goes :) Thank you both of you.