I purchased an in-the-hoop fingerless glove design from our Vicki about a year ago. Her designs are wonderful and very reasonably priced!!!! They are referred to as mitts.
http://www.basketkasedesigns.com
Here is one more tutorial. Most of these links that I have given use fleece, but I have also seen some made with old sweaters & socks. Some of the sweaters were felted first.
http://zaaberry.blogspot.com/2011...
Here are links to tutorials to make & sew your own fingerless gloves.
On the 1st link you have access to 9 pages of tutorials. Look for the ones that say Clothing in the category. The rest of the links are to some that I thought were especially good.
http://www.craftster.org/forum/in...;sa=showtopics;tag=fingerless_gloves;tagPage=1
http://www.craftster.org/forum/in...
http://www.craftster.org/forum/in...
There are now several site with fingerless gloves made in the hoop on your embroidery machine. Search for "ITH Fingerless Gloves Machine Embroidery". Here are some made by a cutie, elemausi. The link is near the bottom of the post.
http://www.cuteembroidery.com/956...
Here is another site with designs for sale.
http://threadsnscissors.com/proje...
Is this what you are looking for?
I just Googled: How to make fabric fingerless gloves....