sorting text in a text box

[JMM427]

I am trying to sort letters that are entered into a text box by a user. I want it to sort as the user is leaving the textbox. I thought about using the split method to create an array. The user will be entering a string of letters like "cbdafqg". I want to make sure it sorts to "abcdfgq" upon exiting. Am I on the right track or is there an easier way to do this?

Private Sub txtChangeCode_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtChangeCode.Leave
        txtChangeCode.Text = txtChangeCode.Text.ToUpper
        Dim strCodes(txtChangeCode.Text.Length) As String
        strCodes = txtChangeCode.Text.Split()
        Array.Sort(strCodes)
        Dim strSorted As String
        Dim i As Integer
        For i = 0 To strCodes.Length - 1
            strSorted = strSorted & strCodes(i)
        Next i
        txtChangeCode.Text = strSorted
    End Sub

Am I correct that you can't split without a delimiter? like a "." or "/", etc.?

Thanks in advance.