I use cURL to send messages to Twitter like this:
FIRSTSC is the twitter account
:"xxxxxxxxxxx" is the password
status = is the message to send
C:\bin\TBAFetch\CURL.exe --basic --user FIRSTSC:"xxxxxxxxxx" --data status="Qual 18 [16:80] R: 2430-21-2187 B: 3025-1379-1730 #frc"
http://twitter.com/statuses/update.xml
Not sure if that is what you are looking for....s