How to get selection of a DropdownListBox and its event handler

Hi,
I am trying to get the selection of a DropdownListBox in its event handler. The thing is, that I can´t cast the Component to a DropdownListBox.
DropDownListBox secondDDLB = (DropDownListBox)this.getComponentByName("SecondUserDDLB");
How I can get the selected item in an event handler ?
Regards
Flo

DropDownListBox NO
DropdownListBox YES
Regards

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