In can be put in any VBA module...
FYI From Excel help....
On the Tools menu in Microsoft Excel, point to Macro, and then click Visual
Basic Editor.
1.. On the Insert menu, click Module.
2.. Type or copy your code into the code window of the module.
3.. If you want to run the macro from the module window, press F5.
4.. When you're finished writing your macro, click Close and Return to
Microsoft Excel on the File menu.