Showing specific Menu items only

I have two popup menus and would like to show only specific menu items in the second popup menu, depending on what is chosen in the 1st popup menu. How would I code this?

I tried this, but that doesn’t seem to way to do this:

if PopQSCategory.SelectedRowIndex = 0 then // If the Action Category is selected from the PopQSCategory popup menu...
  //Show Story Type values 0-9
  PopQSStoryType.InitialValue =  "Capture and Escape" + "Chase" + "Coming of Age" + "Kidnap and Rescue" + "Local Adventure" + "Love Story" + "Puzzle" + "Revenge" + "Supernatural Transformation" + "Triumphant Victim"
end if

Also, how is this kind of instruction called? So I can search for this.

InitialValue is read-only. It can only be set in the inspector, not by code.

What you want to do is remove all rows, then replace them with new items.

For instance if PopupMenu1 had 2 choices of Letters or Numbers, in the SelectionChanged event of Popup #1 you would have something like:

If Me.SelectedRowIndex = 0 Then
  PopupMenu2.AddAllRows("A", "B", "C", "D", "E", "F", "G", "H", "I", "J")
ElseIf Me.SelectedRowIndex = 1 Then
  PopupMenu2.AddAllRows("1", "2", "3", "4", "5", "6", "7", "8", "9", "10")
End If

You’ll want to check out AddAllRows, AddRow, and AddRowAt, RowValueAt, among others in the DesktopPopuMenu documentation. DesktopPopupMenu — Xojo documentation

Thanks so much, Mark. This works great.