Custom properties provide a mechanism for data flow objects to expose additional properties beyond those implemented in the interface itself. For example, the OLE DB source adapter contains a custom property that allows the user to specify the SQL statement for the data source.
The custom property collection of the IDTSComponentMetaData90 interface is populated during a call to the ProvideComponentProperties method. Properties should not be added to this collection at any other time.
The following interfaces contain a custom property collection: