References a 
Progress.Data.TableDesc class instance that specifies schema information for the data associated with a 
BindingSource object.
  
   In the Visual Designer, when you define the logical schema (tables and fields) for a 
BindingSource object, the Visual Designer's auto-generated code stores this information using the 
TableSchema property. At run time, the actual data source object (such as an ABL query or ProDataSet) is specified by setting the 
Handle property of the 
BindingSource. The generated code then matches up the logical schema that you defined with the data source object in order to display the correct data. For more information, see the reference entry for the 
Progress.Data.TableDesc class in this book.