Display All in list box

Hi All,

I want to display a [Region] dimension on a list box. and filter the cross-tab using it.

Created a List box and Cross-Tab.

Used the below script to display [Region] in the list box On startup.

LISTBOX_1.setItems(DS_1.getMemberList("0REG_CODE", MemberPresentation.INTERNAL_KEY, MemberDisplay.TEXT, 10));

Above statement working perfectly.

What changes required to my script, if i want to include "All Regions" into the list box? (I will get the consolidated of all regions if i include "All Regions")

Followed the below tutorial to create the list box and everything. Read many other post, but didnt find the way to display "All" in list box

Create a list box with multiple selection capabilities: Design Studio 1.2 - YouTube