Change accept button with tabs

Question

I have a windows form application written in C# and it has three tabs and I would like the accept button change with the active tab. Like When I am in tab 1 I want button _

Answer 1

TabControl have SelectedIndexChanged event.

private void tabControl1_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (tabControl1.SelectedTab == tabControl1.TabPages["RenewalTab"])
        {
            this.AcceptButton = btnRenewal;
        }
        else if (tabControl1.SelectedTab == tabControl1.TabPages["SellerTab"])
        {
            this.AcceptButton = btnSeller;
        }
    }