Write a BeforeGetParams event handler to respond to custom information from a client dataset. BeforeGetParams is part of the mechanism by which a provider and a client dataset communicate information during parameter fetching. When the provider is part of a stateless application server, this mechanism allows the provider and the client dataset to communicate persistent state information. 

When the client dataset fetches parameter values from the provider, the following events occur: 

1.The client dataset receives a BeforeGetParams event, where it can encode custom information into an OleVariant. 

2.The provider receives a BeforeGetParams event, where the OleVariant from the client dataset appears as the OwnerData parameter. The provider can respond to or change that information before it fetches and encodes the parameter values.  

3.The provider generates an OleVariant for the current parameter values of its dataset, if appropriate. 

4.The provider receives an AfterGetParams event, where it can encode custom information into its OwnerData parameter or respond to information from the BeforeGetParams event handler. 

5.The client dataset receives an AfterGetParams event, where it can respond to the custom information returned by the provider in its AfterGetParams event handler. 

AS_GetParams 

GetParams 

BeforeGetParams 

aftergetparams 

Communicating with the Client Dataset