It's quite easy to program a function key to send username and password information to an application. You'll have to use the Sendkeys command type hotkey for that. An example:
to send username Dennis Cross and password MyPassword to the active window when you press F5 do the following:
1. Press Win+H to bring up the Hotkeys editor
2. Click the 'New' button
3. Type 'Send username and password' in the
description field
4. Select 'Send keystrokes' from the Action combo
box.
5. Type 'Dennis Cross{TAB}MyPassword' in the
keys to send text field (without the quotes)
6. Select F5 from the hotkey combobox.
7. Press the Apply button.
Now, whenever you press F5, the text you specified will be sent to the active window.
Hope this answers your question.
With best regards
Arjen Broeze
P.S. The text in the hotkeys editor cannot be masked yet with an asterisk (this will be a new feature in version 1.6 which will be released at the end of this month)