private void brightnessToolStripMenuItem_Click(object sender, EventArgs e)
{
brightnessFrm bFrm = new WindowsFormsApplication1.brightnessFrm();
bFrm.SetImgFactory(imageFactory);
bFrm.Show();
bFrm.FormClosed += new FormClosedEventHandler(brightnessFrmClosed);
}
void brightnessFrmClosed(object sender, FormClosedEventArgs e)
{
brightnessFrm bForm = (brightnessFrm)sender;
pictureBox.Image = imageFactory.Image;
}