Before you can send instant messages to other people, they need to be in your Contacts list. You can add a person who has a Windows Live ID or a Yahoo member (New!) to your Contacts list by using the Add a contact button. If the person that you want to contact doesn’t have Windows Live Messenger or an ID, you can send the person an e-mail with information about getting and installing Windows Live Messenger and obtaining an ID.
Add an Outline Contact
Double-click the Windows Live Messenger icon in the notification area of the taskbar, and then sign in, if necessary.
Click the Add a contact button.
Type the e-mail address of the person you want to add.
If the person doesn’t have Windows Live Messenger, type a personal invitation message.
Type a nickname that others see during a conversation.
To add a contact to a group, click the Group button arrow, and then select a group.
In the Contact, Personal, Work, and Notes sections, enter the information you want to include.
Select or clear the Subscribe to updates for this contact check box.
You can quickly delete a contact. Right-click a contact, click Delete contact, select or clear the Also block this contact and Also remove from my hotmail contacts check boxes, and then click Delete contact.