To reset the value of the NullText property to its default value, DefaultNullText, the ResetNullText method must be called or the NullText property set to a null reference (Nothing in Visual Basic).
Requirements
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2