Hi

After some fun filled hours playing around with excel, I started using the .xla (2003) file and found I can do it with that.

Application.CommandBars.Item("CodeCogs").Controls(1).Execute

replacing 1 with 1-4 depending on which button.

I tried for hours trying to get

Application.CommandBars.ExecuteMso("x1:b_equate") to work with the 2007 version, replacing x with the ProgID and other possibilities.