DateTimePicker

is it possible to tab through the month/day/year on the DTP?

Yes it is.

VB Code:

Public Class tabDTP
        Inherits DateTimePicker
        Protected Overrides Function ProcessDialogKey(ByVal keyData As System.Windows.Forms.Keys) As Boolean
            If keyData = Keys.Tab Then
                SendKeys.Send("{RIGHT}")
                Return True
            ElseIf keyData = (Keys.Shift Or Keys.Tab) Then
                SendKeys.Send("{Left}")
                Return True
            Else
                Return MyBase.ProcessDialogKey(keyData)
            End If
        End Function
    End Class

And where you need it in your code:

VB Code:

Dim myDTP as New tabDTP