ICQ Messages - Sending
Once you have added users to your Contact List, you may send them instant messages:

To send a message to a user on your Contact List:
1. Double-click the user's name on your Contact List to open the message dialog.
2. Type your message into the lower field-the Enter Message field.
3. Click on the Send button when you have finished typing your message. When sending the message, the dialog will remain open and the text you typed will automatically move to the upper field.