IUIX_Label::NotifyTarget Property
From PDF XChange PDF SDK
NotifyTarget property allows sending messages of e_Notify type from current UI object to another UI object. If current object's NotifyTarget property is not set explicitly, then e_Notify messages will be directed to its nearest parent (if any) by default.
Syntax
HRESULT get_NotifyTarget([out, retval] IUIX_Obj** ppTarget); HRESULT put_NotifyTarget([in] IUIX_Obj* ppTarget);