multiinherit trouble? ....template QList

[bigbigmoon]

hello every,
I hope that A inherit from QListBox and QPopupMenu ,but there 's something wrong with it :

souce code :

class spinxList :public QListBox ,public QPopupMenu 
{
Q_OBJECT public :
..........
}

class spinxList :public QListBox ,public QPopupMenu 
{
Q_OBJECT public :
..........
}

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error :
'QObject ' is an ambiguous base of 'spinxList ',
what can i do to solve this problem ?

another problem :
I learn about that QList is a template class ,it 's items can be of any type .
but I could't find the class QList from QT referrence document ,
is there the template class ?

thank you for your reply !