private void comboBox2_KeyPress(object sender, KeyPressEventArgs e)
 {
     if ((int)e.KeyChar == (int)Keys.Enter)
     {
         TXTOBSER.Focus();
     }
 }
 private void dateTimePicker2_KeyPress(object sender, KeyPressEventArgs e)
 {
     if ((int)e.KeyChar == (int)Keys.Enter)
     {
         TXTOBSER.Focus();
     }
 }