Returns which mouse button triggered the current script. If called in a line of execution that started with a click handler (OnMouseDown, OnMouseUp, OnClick, OnDoubleClick, PreClick, or PostClick), returns a string identifying which mouse button triggered the handler. Otherwise, returns nil.
See also Utility functions.
Signature:
button = GetMouseButtonClicked()
Returns:
button- Name of the mouse button that triggered the current script (string)