How to capture the event of clicking on drop down button of a combo box?

Hi all,



I just want to implement a search combo box that allows users to enter some
text. When clicking on the drop down button, the pop-up list will show all
matched results. Because the result list may be huge, adding result items to
the combo box as user is typing is not a good solution, so I'm looking for a
way of adding items to the combo box only when user clicks on the drop down
button.



It seems that the wx.ComboBox does not support the event of clicking on its
drop down button. Is there a way to work around this?



Thanks in advance for any help!



Best regards,

Tai Tran