How can I delete permanently my inbox message on Facebook?

[Afie]

Well I do know how to delete it by clicking "delete conversation" or "delete message". But the problem is my message still appears on my friends inbox ? even if I already delete it. Can anyone help me and tell me how to delete it permanently so that it can't be appears anymore on their inbox.

p/s : Sorry about my English, I'm not really good in speaking English.
By the way, I know the old facebook can delete it on the recipient inbox directly when i delete it on my ibox. But now the new facebook is seems very useless, it can't delete it !

[Taylor]

Deleting a message from your inbox will not delete the message from your friend's inbox.

To delete one or more messages from a conversation in your inbox you can follow this steps!

1. Click Messages on the left side of your homepage
2. Open the conversation you want to delete a message from
3. From the Actions menu, click Delete Messages...
4. Use the checkboxes to select what messages you want to delete
5. Click Delete

You can delete an entire conversation by clicking Delete Conversation from the Actions menu. Keep in mind, once you delete your copy of this conversation, it cannot be undone.

[Sam]

1. Click Messages on the left side of your homepage
2. Open the conversation you want to delete a message from
3. From the Actions menu, click Delete Messages...
4. Use the checkboxes to select what messages you want to delete
5. Click Delete

as mentioned, but this does not permanently delete it, to permanently delete every message you have to permanently delete your account, facebook holds your messages for life, and link it to your IP, they also sell it on