Between Dates Function

Hello,
I have a form with two text boxes. One, named txtDOB returns that age of a person. The other control is simply named txtmsg.

I would like to add a code to the OnChange event that provides a message based on the range of dates entered in the txtDOB control.

Example. If I type in the txtDOB the date 12/31/1937, I get in the txtmsg the following text: FRA 65. This is the code that I am using:

If Me!txtDOB <= "12/31/1937" Then
Me!txtmsg = "FRA 65"

I now would like to add a between And function that returns a message if the date I enter the txtDOB is in a specific range. I need something like this but obviously this code does not work:

If Me!txtDOB Between "01/02/1938" And "01/01/1939" Then
Me!txtFRA = "FRA 65+2"
End If

Thanks for the help.