Fritz,
In order to attach a macro to your button, open the Visual Basic editor
(Shift-F11) then click on the sheet containing the button, then click the
down arrow of the combobox showing General, and select your button. Normally
Excel will create a new routine called Private Sub CommandButton1_Click().
Simply insert the name of your macro with ventual parameters below that line.
If you want to associate your macro to another event of this button, select
the event on the second combobox at the top.
Stephane.