SelChanging (Item) |

Funktionsname | c:<CONTROL-NAME>_OnSelChanging
Syntax | `(defun c:<CONTROL-NAME>_OnSelChanging (ItemIndex [as Long] /) )`
Rückgabewert | Boolean
Ausgelöst durch | 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.