Message message = new Message(); // Here, the message can be an instance returned by another API, such as the message list API.

    TIMResult res = TencentIMSDK.MsgRevoke(conv_id, TIMConvType.kTIMConv_C2C, message, (int code, string desc, string user_data) => {
      // Process the callback logic
    });

TencentIMSDK.SetMsgRevokeCallback((List<MsgLocator> msg_locator, string user_data) => {
      // Process the recalled message among locally maintained messages
});