private void btnThemKH_Click(object sender, EventArgs e)
{
frmThemKH f = new frmThemKH();
f.ShowDialog();
cbbMaKH.DataSource = BUS.GetDataKH();
cbbMaKH.DisplayMember = "IDKhachHang";
cbbMaKH.Text = "Chọn mã KH";
}
private void thêmKháchHàngToolStripMenuItem_Click(object sender, EventArgs e)
{
frmThemKH frmThemKH = new frmThemKH();
frmThemKH.Show();
}