private void frmSett3D_FormClosed(object sender, FormClosedEventArgs e)
{
frmSett3D = null;
}
private void additionallyToolStripMenuItem_Click(object sender, EventArgs e)
{
//вызов 3Д формы
//покажем графические настройки
if (frmSett3D == null)
{
frmSett3D = new Sett3D();
frmSett3D.FormClosed += new FormClosedEventHandler(frmSett3D_FormClosed);
frmSett3D.Show();
}
else
{
frmSett3D.Show();
}
}