Use GetResults to force a DBMS to return the output parameter values. This method is optional for most cases, because AnyDAC will receive the output parameter values automatically. Although, when the command has few active not yet processed result sets, and you do not plan to use these result sets, but going to get output parameter values, then depending on a DBMS you may need to call first the GetResults method.

procedure GetResults;

Executing Command, Executing Stored Procedure