How to automatically hide all of a certain file type in a folder tree?

I ask because I have just noticed that when I open WORD files that the newly generated WBK-files are visible despite me using the "attrib +h *.nfo /s" command previously. I foolishly hoped that also all future '*.wbk's would automatically be hidden too. Is there anything that I can do about it without repeating the manual command prompt all the time as suggested in http://www.sevenforums.com/customization/81717-hide-all-certain-file-type-folder-tree.html??

You could put the command in a batch file and either double click it to run it or use Task Manager to schedule a task that runs it every so often.

Make sure to include the proper path and quotes:

attrib +h "C:\Users\Your Account Name\Whatever\*.nfo" /s