In notepad type

dsadd user “cn=%1, ou=OUName, dc=YourDomain, dc=YourSuffix” -fn %2 -ln %3 -pwd fred -mustchpwd yes

Save as a bat file.

cn = command name (user name)
fn = first name
ln = Last name

Everything in bold you replace with your own info.

Name the file whatever, like adduser.bat

Example:

adduser testdummy Test Dummy

Would add the user Test Dummy