// Return the incremented value for a ValueQT
        private int IncrementItemValue(MyDaAddressSpaceElement item)
        {
            // get actual value
            ValueQT itemValue = null;

            item.GetCacheValue(ref itemValue);
            Type   dataType = itemValue.Data.GetType();
            object newValue = null;

            if (dataType == typeof(bool))
            {
                newValue = !(bool)itemValue.Data;
            }
            if (dataType == typeof(Byte))
            {
                newValue = (Byte)((Byte)itemValue.Data + m_increment);
            }
            if (dataType == typeof(SByte))
            {
                newValue = (SByte)((SByte)itemValue.Data + m_increment);
            }
            if (dataType == typeof(UInt16))
            {
                newValue = (UInt16)((UInt16)itemValue.Data + m_increment);
            }
            if (dataType == typeof(Int16))
            {
                newValue = (Int16)((Int16)itemValue.Data + m_increment);
            }
            if (dataType == typeof(UInt32))
            {
                newValue = (UInt32)((UInt32)itemValue.Data + m_increment);
            }
            if (dataType == typeof(Int32))
            {
                newValue = (Int32)((Int32)itemValue.Data + m_increment);
            }
            if (dataType == typeof(UInt64))
            {
                newValue = (UInt64)((UInt64)itemValue.Data + m_increment);
            }
            if (dataType == typeof(Int64))
            {
                newValue = (Int64)((Int64)itemValue.Data + m_increment);
            }
            if (dataType == typeof(Single))
            {
                newValue = (Single)((Single)itemValue.Data + m_increment);
            }
            if (dataType == typeof(Double))
            {
                newValue = (Double)((Double)itemValue.Data + m_increment);
            }

            // apply new value
            return(item.ValueChanged(new ValueQT(newValue, EnumQuality.GOOD, DateTime.Now)));
        }