How can I use the option NoWait in a popup menu?

While typing in an edit box and after each typed letter a popup appears and
remains there.
I have to use NoWait option in order to be able to continue typing.
The same popup is activated if I right click on the textbox.

If I click an item on the popup that is activated with the NoWait option,
Bar() returns nothing.

Demetrios, Greece