private void testarConexãoToolStripMenuItem_Click(object sender, EventArgs e)
{
if (TelaTestarConexao == null)
{
TelaTestarConexao = new TelaTesteConexao();
TelaTestarConexao.MdiParent = this;
TelaTestarConexao.FormClosed += TelaTestarConexao_FormClosed;
TelaTestarConexao.Show();
}
else
{
TelaTestarConexao.Activate();
}
}
private void TelaTestarConexao_FormClosed(object sender, FormClosedEventArgs e)
{
TelaTestarConexao = null;
}