Returns empty string if not implemented. Otherwise a string is returned with the format nn.nn.nnnn, where the first two digits are the major version, the second two digits are the minor version, and the last four digits are the release version. This value can be overridden by setting the TDBXPropertyNamesEx.ProductVersion connection property. Note that TDBXPropertyNamesEx.ProductVersion is the name of the property, not the property itself. 

TDBXPropertyNamesEx