public MainForm()
{
//
// The InitializeComponent() call is required for Windows Forms designer support.
//
InitializeComponent();
clsbill = new ClsBiLL();
//
// TODO: Add constructor code after the InitializeComponent() call.
//
}
public Login()
{
InitializeComponent();
clbill = new ClsBiLL();
}
public QuanLyUser()
{
InitializeComponent();
clsbill = new ClsBiLL();
}
public TraCuu()
{
InitializeComponent();
clsbill = new ClsBiLL();
}