private void btnThanhToan_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
foreach (Form frm in this.MdiChildren)
{
frm.Close();
}
FrmPhieuThanhToan nv = new FrmPhieuThanhToan();
nv.Dock = DockStyle.Fill;
nv.MdiParent = this;
nv.Show();
}
private void btnPhieuThanhToan_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
FrmPhieuThanhToan frmPtt = new FrmPhieuThanhToan();
frmPtt.Show();
}