private void الموردToolStripMenuItem_Click(object sender, EventArgs e)
{
if (supplier == null)
{
supplier = new supplier();
supplier.MdiParent = this;
supplier.FormClosed += new FormClosedEventHandler(supplier_FormClosed);
supplier.Show();
}
else
{
category.Activate();
}
}
void supplier_FormClosed(object sender, FormClosedEventArgs e)
{
//throw new NotImplementedException();
supplier = null;
}
