Real MDI child windows tabbing

Hello,
We are at the beginning of the new project and researching available libraries for tabbed mdi. On of the candidate is your UIStudio.
Question:
Can DocManager handle real mdi child windows rather than DocumentWindows?
Here is what I mean.

private void button1_Click(object sender, System.EventArgs e)
{
ChildForm childForm = new ChildForm();
childForm.MdiParent = this;
childForm.Show();
}

I can see child window if I DockManager.DocumentMdiStyle to Standard, but as soon as I change it to Tabbed in runtime ChildWindow is gone.
Is there a way to make DockManager to host just Forms?

Thanks
Oleg
laplas-soft.com