public FormPrincipal()
{
InitializeComponent();
mostrarToolStripMenuItem.Enabled = false;
mostrar = new FormMostrar();
test = new FrmTestDelegados();
}
private void mostrarToolStripMenuItem_Click(object sender, EventArgs e)
{
mostrar = new FormMostrar();
mostrar.MdiParent = this;
mostrar.Show();
}