public void ChangeSource(int index)
		{
			_twain32.ChangeSource(index);
			if (_twain32.ChangeSourceResp != null)
				throw new Exception(_twain32.ChangeSourceResp);

			var currentSource = _twain32.GetSourceProduct(_twain32.SourceIndex);
			_currentSource = new TwainSource(currentSource, _twain32, index);
		}
        public void ChangeSource(int index)
        {
            _twain32.ChangeSource(index);
            if (_twain32.ChangeSourceResp != null)
            {
                throw new Exception(_twain32.ChangeSourceResp);
            }

            var currentSource = _twain32.GetSourceProduct(_twain32.SourceIndex);

            _currentSource = new TwainSource(currentSource, _twain32, index);
        }