Returns a flag used to set the selected element of a pop-up menu.
- macOS 10.0+
- Core Foundation
The index of the pop-up menu element to select. The index corresponds to the order in which the pop-up menu elements are listed in the
karray of the user notification’s description dictionary.
CFUser Notification Pop Up Titles Key
idxmust be in the range
A flag that can be used to set the selected element of a pop-up menu when creating a user notification with