ImplCreateRequestContext creates a new request and response objects based on the specified parameters and stores it with the global Web context. The adapter dispatcher calls this function before calling HandleRequest. The WebSnap can access the resulting request and response context by reading the AdapterRequest and AdapterResponse properties of the Web context, which is available through the global WebContext function. 

DispatchParams is an interface that contains the parameters that were included in the incoming request. These parameters can then be used to identify an image for this field's value. 

CreateRequestContext 

AdapterRequest 

AdapterResponse 

IAdapterDispatchParams 

WebContext