private void btnKhachHang_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
FrmKhachHang fkhachhang = new FrmKhachHang();
fkhachhang.MdiParent = this;
fkhachhang.Show();
}
private void barButtonItem4_ItemClick(object sender, ItemClickEventArgs e)
{
Form frm = Checkform((typeof(FrmKhachHang)));
if (frm != null)
{
frm.Activate();
}
else
{
FrmKhachHang frmKH = new FrmKhachHang();
frmKH.MdiParent = this;
frmKH.Show();
}
}