Icon in QToolBox

[giusepped]

I tried simply

toolBox->setItemIcon(0,QIcon(":/images/test.png"));

toolBox->setItemIcon(0,QIcon(":/images/test.png"));

To copy to clipboard, switch view to plain text mode 

but nothing appear in the tab of the QToolBox.
I have correctly update the resource file and save the image in images folder
Something missing?