windows - How can I get the "dir" and "copy" commands to operate on "*.xyz" but not "*.xyz~"?

When I use copy *.txt somefolder\ the system seems to copy all *.txt~ files too, which is not what I want. A similar same effect can be seen with dir:

C:\Users\Paul\Documents\Programs\Proffy>dir *.txt
 Volume in drive C is Vista
 Volume Serial Number is EC23-AD6B

 Directory of C:\Users\Paul\Documents\Programs\Proffy

29/11/2008  13:54            35,821 COPYING.txt
31/10/2009  21:54             1,644 INSTRUCTIONS.txt
06/06/2009  15:57             1,393 INSTRUCTIONS.txt~
04/01/2009  11:59               116 Notes.txt
19/04/2009  16:53               134 README.txt
04/01/2009  12:42               132 README.txt~
31/10/2009  21:30               197 TODO.txt
31/10/2009  19:10               414 TODO.txt~
               8 File(s)         39,851 bytes
               0 Dir(s)  41,938,862,080 bytes free

C:\Users\Paul\Documents\Programs\Proffy>

How can I get dir and copy to only operate on files that end with .txt and not .txt~?

Answer

My solution was to execute del *.xyz~ prior to my copy *.xyz. Not brilliant, but it works.