VB.NET: Char.IsLetter()

Fungsi ini untuk mengecek apakah nilai string hanya huruf (A-z).

Contoh:
UI:

Code:
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles TextBox1.TextChanged

  If Char.IsLetter(TextBox1.Text.Chars(TextBox1.TextLength - 1)) = False Then
      MsgBox("Hanya Huruf")
  End If

End Sub

Runtime:

 

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