combobox.change event fires when form opens. [Resolved]

[MIKEADKINS]

I know that I can progam around this but still not quite sure why it happens. I have a project where a form has a combobox.change event that has code in it that gives the user a message that they are about to cause something to happen by changing the selection in the combo box. However, when the form opens the change event fires and the message box appears. The code is simple

Private Sub cboBox1_change()
msgbox "You just changed your selection"
End Sub

As the form opens the Message appears "You just changed your selection" and then after the user clicks ok the form opens. Why does the event Change fire as the form is opening? Is there a better way of handling this? Or do I just write come code to check to see if the form is open before the change event should occur? Thanks again for everyones help in the past. I continue to learn from this site.
Mike