Wx::DatePicker

Hi

Can anyone help, how can I pass a style to the datepicker I have

$this->{releaseDate} = Wx::DatePickerCtrl->new( $panel, -1 );

Which shows the date and some spinners however I would like a drop down
calendar , but when I try and pass it a style to have a dropdown
(wxDP_DROPDOWN) it fails. I am using ms windows xp, perl v5.8.2 and Wx
[0.73.1.14].

Many thanks

Peter

For info I have tried.

$this->{releaseDate} = Wx::DatePickerCtrl->new( $panel, -1, , , ,
wxDP_DROPDOWN );

And it fails telling me this:

the invocant must be a reference at ... <the line of code above>