Split string into Sub String - vb.net

Question

I Am Using Vb.net. My idea is when I paste (ctrl+v) for example this character :
AHAKAPATARAE
I Have 6 textboxes.
it would automatically paste them in textboxes one by one in order!
so
txtBox1 will contain : AH
txtBox2 : AK
txtBox3 : AP
txtBox4 : AT
texbox5 : AR
texbox6 : AE
The automation of inserting Licence Keys will ease so much
so that user will not work so hard to cut & paste each two digits!
so any suggestion of doing auto-fill inside textboxes..?
Thanks.

Answer 1

This will allow the paste into the first textbox, as well as move forward correctly if the user types the whole thing manually starting in the first box:
Private Sub txtBox1_TextChanged(sender As Object, e As EventArgs) Handles txtBox6.TextChanged, txtBox5.TextChanged, txtBox4.TextChanged, txtBox3.TextChanged, txtBox2.TextChanged, txtBox1.TextChanged
Dim TB As TextBox = DirectCast(sender, TextBox)
Dim value As String = TB.Text
If value.Length > 2 Then
TB.Text = value.Substring(0, 2)
Dim TBs() As TextBox = {txtBox1, txtBox2, txtBox3, txtBox4, txtBox5, txtBox6}
Dim index As Integer = Array.IndexOf(TBs, TB)
If index > -1 AndAlso index < (TBs.Length - 1) Then
index = index + 1
TBs(index).Text = value.Substring(2)
TBs(index).Focus()
TBs(index).SelectionStart = TBs(index).TextLength
End If
End If
End Sub
There are definitely many more ways this could be accomplished...

Answer 2

Handle the key down event on textbox 1
Private Sub txtBox1_KeyDown(sender As Object, e As System.Windows.Forms.KeyEventArgs) Handles txtBox1.KeyDown
If e.Modifiers = Keys.Control AndAlso e.KeyCode = Keys.V Then
' Get Clipboard Text
Dim cpText as String = My.Computer.Clipboard.GetText()
' Assign
txtBox1.Text = cpText.Substring(0, 2)
txtBox2.Text = cpText.Substring(2, 2)
txtBox3.Text = cpText.Substring(4, 2)
txtBox4.Text = cpText.Substring(6, 2)
txtBox5.Text = cpText.Substring(8, 2)
txtBox6.Text = cpText.Substring(10, 2)
'the event has been handled manually
e.Handled = True
End If
End Sub
Another option is to have one masked textbox event. Might be easier