private void kháchHàngToolStripMenuItem_Click(object sender, EventArgs e)
{
FrmKhachHang frm = new FrmKhachHang();
this.Hide();
frm.Show();
}
private void btnKhachHang_ItemClick(object sender, ItemClickEventArgs e)
{
/* Display KhachHang form in tabbed */
Form hd = CheckForm(typeof(FrmKhachHang));
if (hd != null)
{
hd.Activate();
}
else
{
var form = new FrmKhachHang {
MdiParent = this
};
form.Show();
}
}