Handle property (Windows only; GUI for .NET only) The handle to the ABL data source object to which the BindingSource object is bound. This can be a query, ProDataSet, or buffer object handle. Data type: HANDLE Access: PUBLIC Readable/Writeable Applies to: Progress.Data.BindingSource class You can use this property to associate an ABL data source object with an unbound BindingSource object instance at run time.