You can't.
Is there a good reason that it needs to be deleted, such as you posted some proprietary information? If so, you can go to the options menu to the upper right of your message and pick Notify Moderator. Give a good reason as to why it needs to be deleted.
I know you realize the LabVIEW forum was unrelated to your question. Feedback on NI Discussion Forums is the forum for questions and issues about the forums.
