public static frm02 openForm()
{
if (form == null)
{
form = new frm02();
}
return(form);
}
private void frm02_FormClosing(object sender, FormClosingEventArgs e)
{
form = null;
}
private void btnAbrirFrom02_Click(object sender, EventArgs e)
{
_frm02 = frm02.openForm();
_frm02.Show();
}