Converting project to xE4

I am converting a Delphi 2007 project to XE4. The following code example produces an 'incompatible types': TObject and System.TArray[System.Byte> error:

RzRankListBox1.AddObject('Name', wwdbGrid1.SelectedList.Items[0]);

I am hoping you have a suggest on how to work around this problem as I have much code doing this type of thing in the 2007 project.

Thanks much

Thanks