Vista - DOS Keyboard layout problem

I'm using a swiss-french keyboard.

In windows applications everything is ok.

When I open a dos command prompt the keyboard works normally, if I use Edit
(dos default editor) or BP.exe (Borland Pascal editor, compiler, ...) I loose
the swiss french keyboard and I've got the default american (?) keyboard.

Has anybody an idea to correct this ?

For those who don't use the american keyboard can they reproduce this problem.

Thanks for any help.

JP