Modifying auto-mode-alist in .emacs

[exits funnel]

Hello,

I've made some customizations to c++ mode which work
pretty well.  Unfortunately when I visit a header file
with the extension '.h', the file is opened in c-mode.
 I'm trying to figure out what I need to add to my
.emacs file to get emacs to open these header files in
c++ mode.  I've been poking around the info pages and
I've read about auto-mode-alist but I can't figure out
how to make the appropriate change to this variable in
my .emacs file.  If someone could help me with this
I'd really appreciate it.  Thanks in advance.

-exits

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