如何在Excel 2010中自动向功能区添加按钮

Is it possible to automatically add a button to Excel Ribbon to run a macro when a user open an Excel file. Problem is I have developed a macro and would like to share it with my group members. Now on my personal computer I could customize the ribbon and assign a given button to my macro but this ribbon customization will only be available for me. So after I send out the workbook to members of my group, they will not see the button that I have assigned for the macro. I could add an ActiveX control but this will be on the sheet itself and not on the ribbon (Excel 2010)Is it possible to automatically add a button to