FileOpenDialog

Hi,
    In My Application, i want to have a Three ComboBox in a FileOpenDialog...

Normally the open dialog will have two have combobox...I want to have one more combobox...

How can i achieve this using wxFileDialog or, is there any other way

Kindly let me know....

Give Sample of code to achieve three combobox in a FileOpen Dialog

Thanks In Advance

Regards
Bala