public frmBanhang()
{
InitializeComponent();
bhb = new BUS.BanhangBUS();
hdb = new BUS.HoadonbanBUS();
khb = new BUS.KhachhangBUS();
camera = new FilterInfoCollection(FilterCategory.VideoInputDevice);
foreach (FilterInfo info in camera)
{
cbbdscam.Items.Add(info.Name);
}
cbbdscam.SelectedIndex = 0;
}