C# - Add TabPage to Tab Control

[mustividyavtahi]

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.

 
public void settab(Form f2)
{
tabControl1.Visible = true;
toolStripButton11.Visible = true;
if (tabControl1.TabPages.ContainsKey(f2.Text))
{
MessageBox.Show("Form already Opened");
tabControl1.SelectTab(f2.Text);
}
else
{
f2.TopLevel = false;
TabPage tp = new TabPage(f2.Text);
 
currenttabcount++;
 
tp.Name = f2.Text;
tp.AutoScroll = true;
tp.BackColor = System.Drawing.Color.White;
tp.ForeColor = System.Drawing.Color.White; ;
tp.UseVisualStyleBackColor = true;
tp.BorderStyle = BorderStyle.None;
tp.Tag = f2;
tabControl1.TabPages.Add(tp);
//tp.Parent = tabControl1;
tabControl1.SelectedTab = tp;
f2.Tag = tp;
f2.Parent = tp;
f2.Location = new Point(0, 0);
f2.Dock = DockStyle.Fill;
f2.Show();
}
 
}