Runtime dynamic linking + Qt4 problem

[jacek]

I'm not realy sure that I understand the diference?

It has nothing to do with C++, it's just a limitation of Qt tools.

I don't know who should be parent for my QAction, this (Plugin) or parent that I pass from main app?

If you use the plugin as a parent, this action will be deleted automatically when you delete the plugin, otherwise you will have to delete it by hand.