private void Pb_info1_Click(object sender, EventArgs e) { if (Application.OpenForms.OfType <FormInfo1>().Count() > 0) { MessageBox.Show(" Já está aberto!"); } else { FormInfo1 FRM1 = new FormInfo1(); FRM1.ShowDialog(); } //https://ecode10.com/artigo/1554/verificar-form-aberto-csharp }
private void BtnSave_Click(object sender, EventArgs e) { FormInfo1 FRM2 = new FormInfo1(); FRM2.ShowDialog(); }