I am developing a windows application using c# in that i used tabcontrol in MDI form to display the child forms. that is working fine. but my problem is when i click a button in that tabpage (child form) it must open another form that also as tabpage which i am not getting . pls help me in this ...pls.....

here is the code through which i am creating tabpages.

Code:
 
public void settab(Form f2)
{
tabControl1.Visible
...