Código:
Public Class frmnro2 Dim cont As Integer = 0 Private Sub txt1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txt1.KeyPress Dim cad As String Dim n As Integer If Char.IsNumber(e.KeyChar) = True Then cont += 1 lbl1.Text = "Numeros ingresados:" & cont ElseIf (Asc(e.KeyChar) = 8) And (n >= 0) Then cad = txt1.Text.ToString n = txt1.SelectionStart() If (Char.IsNumber(cad(n - 1)) = True) And n >= 0 Then cont -= 1 lbl1.Text = "Numeros ingresados:" & cont End If End If End Sub Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txt1.TextChanged End Sub Private Sub frmnro2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load End Sub Private Sub lbl1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lbl1.Click End Sub End Class