private void psr_closed( object sender, EventArgs e )
{
psr = null;
}
private void PSRM_Click( object sender, EventArgs e )
{
if ( psr == null )
{
psr = new PSR();
psr.MdiParent = this;
psr.Closed+=psr_closed;
psr.Show();
}
else
{
psr.Activate();
}
}
