/// <summary>
        /// Set a long vector
        /// </summary>
        /// <param name="value">The new value to set.</param>
        public void SetLongVector(long[] value)
        {
            PropVariant propVar;

            Propsys.InitPropVariantFromInt64Vector(value, (uint)value.Length, out propVar);
            CopyData(propVar);
        }
        /// <summary>
        /// Set a long
        /// </summary>
        /// <param name="value">The new value to set.</param>
        public void SetLong(long value)
        {
            long[] valueArr = new long[] { value };

            PropVariant propVar;

            Propsys.InitPropVariantFromInt64Vector(valueArr, 1, out propVar);

            CreatePropVariantFromVectorElement(propVar);
        }