public void mbtnReturn_Click(object sender, EventArgs e)
{
this.Hide();
frm7Return f = new frm7Return();
f.Name = this.Name;
f.Location = this.Location;
f.ShowDialog();
this.Close();
}
private void btnReturn_Click(object sender, EventArgs e)
{
//launch form Return
//fill all required the customer informations
this.Hide();
frm7Return f = new frm7Return();
f.Location = this.Location;
f.SetMemberID(m.MemberID.ToString());
f.ShowDialog();
this.Close();
}