An embodiment of the present disclosure discloses a method, which comprises: in response to detecting an operation of triggering a hosted application in a hosted application set of a target chat session of a host application by a user in the target chat session through an interface of the target chat session, generating a chat message based on identification information of the triggered hosted application; sending the generated chat message to a server, so that the server sends the chat message to at least one user in the target chat session, and the chat message can be triggered to initiate the triggered hosted application; and displaying the chat message on the interface of the target chat session. This embodiment enables the hosted application to be used as a functional control of the target chat session, which facilitates operating the hosted application in a user group at a client.