public string DocxVariant { get; set; }

Public Property DocxVariant As String
	Get
	Set

public:
property String^ DocxVariant {
	String^ get ();
	void set (String^ value);
}

Property Value

Value: MS-Word_version [strict]?. Examples: 14, 15, 15strict.

Any version other than 14 (MS-Word 2010), 15 (MS-Word 2013), 16 (MS-Word 2016) is currently ignored.

Moreover suffix strict may be used to generate DOCX files marked as being "Strict Open XML".

No default. Generated DOCX files not marked as being compatible with a specific version of MS-Word.

Reference