Abstract: In one implementation, the invention can be an ad-control system for a computer network further comprising a user system. The user system is adapted to generate a user-interactive computer-simulated graphical environment (CSGE) having at least one graphical representation of a product-related item. The user system enables a user to select the product-related item represented in the CSGE. If the user selects the product-related item, then the user system sends a first message to the ad-control system identifying the user and the selected product-related item. The ad-control system is adapted to receive the first message from the user system and transmit a second message to the user containing information corresponding to the product-related item. The first message is transmitted prior to termination of the generation of the CSGE by the user system. The second message is transmitted independently of the state of the CSGE after the selection of the product-related item.