Public Class Form1 Public NOTA As Integer Public PROMEDIO, NAPROBADOS, NREPROBADOS, X, TOTAL, PORCENTAJEDEAPROBADO, SUMA, PORCENTAJEAPROBADO As Double Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click NOTA = TextBox1.Text ListBox1.ITENS.ADD(NOTA) SUMA = 0 X = X - 1 While TOTAL