SendKeys command in a TextBox?

[Jose_VB]

do you have Option Strict on?
where do you declare CantidadJugadas? it needs to be declared at form level to retain it's value

Option strict is off.
I declare it in a module

 Public CantidadJugadas As Integer

I've tried to do the same task, but when I press a button a number is entered into the system. The only thing I do here is to create integer random numbers instead of reading them from the text file.

    Private Sub Button3_Click(sender As System.Object, e As System.EventArgs) Handles Button3.Click
        TEXTBOX_NumeroSalido.Text = Int(Rnd() * 37)
        TEXTBOX_NumeroSalido.Focus()
        SendKeys.Send("{ENTER}")
    End Sub

This piece of code works. Now I'm going to see why in the automated system it doesn't works.