private void btnWizard_Click(object sender, EventArgs e)
{
form1 = new frmWizard("f1");
form2 = new frmWizard("f2");
form3 = new frmWizard("f3");
//form1->form2->form3
form1.nextForm = form2;
form2.nextForm = form3;
form2.beforeForm = form1;
form3.beforeForm = form2;
//设置第一个form的back按钮finish按钮不可按
form1.setBtnBackFalse();
form1.setBtnFinishFalse();
form1.Show();
}