void mainForm_FormClosed(object sender, FormClosedEventArgs e)
{
mainForm = null;
}
//launches form if not already open
private void launchMainForm()
{
if (mainForm == null)
{
mainForm = new MainForm();
mainForm.Show();
mainForm.FormClosed += new FormClosedEventHandler(mainForm_FormClosed); //make form null when closed
}
else mainForm.Activate();
}