On Skype, there is a feature under the "Tools" option that allows you to set your personal preferences for how long a message is stored on your computer. If you change this, the messages will delete themselves after the time period you have selected.
On forums, click edit post then delete post On messages, click delete
You go to your inbox, and next to the messages there is a delete option on the left.
In Facebook there is a notation for new messages. After viewing these messages it is possible to delete them individually or return to the list and delete all. This is done by using the corner x.
Open the messages that you want to delete and use the check boxes to delete the messages from Facebook that you no longer want.
go to messages and click on then and it will say delete message then you say yes :)
you press the delete key really fast. Hold shift as you scroll through the messages, then hit your menu button and delete ...
You can not delete all the messages at the same time on Moshi Monsters. You have to delete each message individually.
If you want to delete all your messages on yahoo at once you have to click ctrl+a and then you click delete
you go to inbox, outbox etc. and check all of the messages on that page and press delete selected messages
Checkmark the email that you want to delete. Then click the delete button.
To delete text messages, if using the touch screen, go to messaging. Then press the little button at the bottom that had the 4 lines (it is next to the little house symbol). When options come up, click on delete threads. But warning: doing this will delete ALL of your messages. I don't know a way on how to delete only one.