I created a custom plugin subclassing QWidget, then I created a plugin subclassing QDesignerCustomWidgetInterface and using this same header as an interface

The plugin works correctly in both static and dynamic configurations if manually loaded by code, but I can't figure out how to show it into the Qt Designer's list box.

I tried creating two classes like this example
http://doc.trolltech.com/4.5/designe...extension.html
but I failed, I tried to include a .pri file into the project but I failed too. I put the dll/lib files of my plugin into the C:\Qt\2010.04\qt\plugins\designer (I am under WinXp) but the plugin won't show up in the list box of the Qt Designer.

Any suggestions? Tell me if a class' code is needed to paste, I can't figure out where's the problem