private void newCustomerToolStripMenuItem_Click(object sender, EventArgs e)
{
frmSale frm = new frmSale();
frm.MdiParent = this;
frm.Show();
}
private void button5_Click_1(object sender, EventArgs e)
{
frmSale frm = new frmSale();
frm.MdiParent = this;
frm.Show();
}
private void button1_Click(object sender, EventArgs e)
{
frmSale frm = new frmSale();
frm.ShowDialog();
}