private void espejoHorizontalToolStripMenuItem_Click(object sender, EventArgs e) { try { ImageForm Image1 = (ImageForm)ActiveMdiChild; ImageForm ImageHorizontal = new ImageForm(); ImageHorizontal.MdiParent = this; ImageHorizontal.horizontal(Image1.getPicture()); ImageHorizontal.Show(); } catch (NullReferenceException) { MessageBox.Show("No hay ninguna foto seleccionada"); } }