Data Access and Transactions

ADC

The Advanced Data Connector (ADC) can be considered the parent of RDS. In fact, the RDS technology used to access remote data is inherited directly from ADC. The early design of ADC was less flexible than the ADO programming model, so it was integrated with ADO to provide a uniform means of accessing remote data. ADC itself is now considered obsolete; RDS (and ADO, which is used by RDS in the middle tier) has replaced ADC programming.

Instead of ADC, use RDS when you need to provide a common programming model for accessing either local or remote data. RDS objects are installed with Microsoft® Internet Explorer 4.0 and Internet Explorer 5 on your client, or you can download them at run time from the .cab files shipped with MDAC components.