BEFORE-event args for WhiteboardState.PageAdding$ — raised by
WhiteboardState.AddPage before the page exists. Handlers may rewrite
Name (the engine trims it; an emptied name falls back to the auto-name) or set
Cancel to veto the add (the caller receives null).
BEFORE-event args for WhiteboardState.PageAdding$ — raised by WhiteboardState.AddPage before the page exists. Handlers may rewrite Name (the engine trims it; an emptied name falls back to the auto-name) or set
Cancelto veto the add (the caller receivesnull).