SelChanging (Item)

Function Name c:<CONTROL-NAME>#OnSelChanging
Syntax   (defun c:<CONTROL-NAME>#OnSelChanging (ItemIndex [as Long] /)
)
Return Type Boolean
Applies To Tab Strip

This event is triggered when the current selection is about to change. ItemIndex is the index of the currently selected tab. A return value of T disallows the change and the ItemIndex tab remains current; otherwise the change is allowed.