I'm new at making conforming clothes. I know how to put handles on, but I don't know how to make the pose files for handle on and handle off. I'd be ever so grateful if someone could point me in the right direction.

Thanks in advance :)

to answer the question you asked, even if handles are a thing of the past, it is often good to know how things were done, either just in case you want to do it that way, especially if you are making clothes for older figures OR simply because you are curious...

there are a couple of ways you can do this,

using a pose file written like this

{
version
    {
    number 4
    }
actor (handle name here)
    {
    off
    }

}

or with a python script called by a pose file

you can contact me via sitemail if you want further information on how to do this.

Locked Out