Poping up ComboBox Items automatically.

Hi all,

I am using a QComboBox, And Adding a itemList in it. my Qt application gets a message From Another application. When i get message list, i add message items in combobox.

Now , after adding items in QComboBox, i want to drag it automatically ,so that all items can be seen at that instant. how to do this? which event or signal should i use?

combobox shows list , only when i press on it.

QComboBox::showPopup()