Defines a driver service call dispatcher.
Dispatch )(struct HdfObject service, int cmdId, struct HdfSBuf data, struct HdfSBuf reply)
int(* HdfIoDispatcher::Dispatch) (struct [HdfObject]($api-api-SmartVision-Devices-HdfObject.md) *service, int cmdId, struct [HdfSBuf]($api-api-SmartVision-Devices-HdfSBuf.md) *data, struct [HdfSBuf]($api-api-SmartVision-Devices-HdfSBuf.md) *reply)
Dispatches a driver service call. service indicates the pointer to the driver service object, id indicates the command word of the function, data indicates the pointer to the data you want to pass to the driver, and reply indicates the pointer to the data returned by the driver.