Convert Date From "dd/MM/yyyy" To "MM/dd/yyyy"?

I'm trying to read dates stored in a Excel sheet, but they are in this format "dd/MM/yyyy" and when I choose a date from MonthCalendar1 it's in "MM/dd/yyyy" format! so I can't compare them together .. I have to make them in the same format ..I get this error when I write this code: (Conversion from string "27/06/2011" to type 'Date' is not valid.)My idea is to convert the "dd/MM/yyyy" to string and then to "MM/dd/yyyy"

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim DateA As Date = Format(CDate("27/06/2011"), "MM/dd/yyyy")
End Sub