Aspose::Words::Markup::IStructuredDocumentTag::get_Placeholder method. Gets the BuildingBlock containing placeholder text which should be displayed when this SDT run contents are empty, the associated mapped XML element is empty as specified via the XmlMapping element or the IsShowingPlaceholderText element is true in C++....which will function as a text box. // The contents that it will...means that clicking on the text box in Microsoft Word will immediately...