public frmProduct()
{
this.ControlBox = false;
InitializeComponent();
proFun = new frmProductFunction();
moFun = new frmModelFunction();
ptFun = new frmPTypeCodeFunction();
tFun = new frmTypeFunction();
}
public frmInvoice()
{
InitializeComponent();
invFun = new frmInvoiceFunction();
proFun = new frmProductFunction();
}