Process Button Clicks

OnAction property of the Button object assigns VBA procedure to the button object.

When you press button, xlCompiler calls this routine.

With .AddButton
.Name = BTN_REG_PAYMENTS_CALENDAR
.Image = "Calendar"
.ImageDisabled = "CalendarDisabled"
.OnAction = "ShowRegPaymentCalendar"
.Tooltip = "Payments Calendar"
End With

Sub ShowRegPaymentCalendar()
' do somtehing
End Sub

OnAction property is used by all ribbon controls.

When selection in the Combobox is changed - routine defined by OnAction button is called.