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Gets or sets whether the style includes the IStyle.FormulaHidden and IStyle.Locked properties.
Use this property to control or inspect whether protection-related settings defined by the style participate when the style is applied.
bool IncludeProtection { get; set; }
Property IncludeProtection As Boolean
IStyle style = workbook.Styles.Add("protectionStyle");
style.Locked = true;
style.FormulaHidden = true;
style.IncludeProtection = false;
worksheet.Range["A1"].Style = style;
bool includeProtection = style.IncludeProtection;