[flexcoders] Move on DropDownList with up or dow key (FB 4.5)

[isa_loyer]

Dear Flexer,

I have a form in custom titleWindow.
I this form, I place DropDownList.
In this list, I'd like to select item with up or down key, but it doesn't work.
Should I implement this?

**************

<s:Form x="0" y="94" id="foPerso" width="100%" height="100%" 
            includeInLayout="true" includeIn="tb1" 
            backgroundColor="#FFFFF">

        <s:layout>
            <s:FormLayout gap="3" paddingLeft="0"/> 

        </s:layout>



        <s:HGroup width="100%" gap="3" horizontalAlign="left" 
resizeMode="noScale"
                  verticalAlign="baseline" >


            <s:DropDownList id="cbQualite" dataProvider="{DP_PAT_CIVIL}"
                            selectedItem="{getSelectedItem(DP_PAT_CIVIL, 
objectPatient.paQualPatient)}" 
                            change="objectPatient.paQualPatient = 
event.currentTarget.selectedItem.label"/>

            <s:FormItem label="Nom" >
                <s:TextInput id="fdNom" width="200" 
                             text="@{objectPatient.paNomU}"

                             />
            </s:FormItem>
            <s:FormItem  label="Prénom" >
                <s:TextInput id="fdPrenom" width="200" 
text="@{objectPatient.paPrenom}"/>
            </s:FormItem>
            <s:DropDownList id="cbDossier1" dataProvider="{DP_PAT_DOS1}" 
width="118" height="22" tabIndex="3"
                            change="objectPatient.paQualPatient = 
event.currentTarget.selectedItem.label"
                            />

            <s:FormItem label="" >
                <s:TextInput id="fDossier1" width="90" paddingRight="5" 
text="@{objectPatient.paDossier1}"/>
            </s:FormItem>
        </s:HGroup>

</s:Form>
**************

Thanks