adding button to collapse all in Visual Studio

adding button to collapse all in Visual Studio

I want to add a new button to a toolbar. I know how to customize a toolbar
but what I want to do is wire the button to execute 2 commands instead of
just one. Currently, I press Ctrl+A to select all the code in a file and
then I press Ctrl+M, Ctrl+M to collapse every function in that file:
that's 2 commands, one for selecting everything and one to collapse
everything. How do I create a button that executes 2 commands?
Thanks.