Codigos Visual

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Button1.ForeColor = Color.Blue

End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

Form2.Show()

End Sub

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

Form2.TextBox1.Text = TextBox1.Text

End Sub

Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

If Me.WindowState = FormWindowState.Maximized Then

Me.WindowState = FormWindowState.Normal

Else

Me.WindowState = FormWindowState.Maximized

End If

End Sub

End Class

Public Class Form2

Private Sub Form2_DoubleClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.DoubleClick

Form3.Show()

End Sub

Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

End Sub

Private Sub RadioButton1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton1.CheckedChanged

Form3.BackColor = Color.Red

End Sub

Private Sub RadioButton2_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton2.CheckedChanged

Form3.BackColor = Color.Yellow

End Sub

Private Sub RadioButton3_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton3.CheckedChanged

Form3.BackColor = Color.BlueViolet

End Sub

Private Sub TextBox2_GotFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox2.GotFocus

Me.TextBox2.Text = "TIENE EL FOCO"

End Sub

Private Sub TextBox2_LostFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox2.LostFocus

Me.TextBox2.Text = "NO TIENE EL FOCO"

End Sub

Private Sub TextBox2_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox2.TextChanged

End Sub

End Class

...