(SOLVED) MDI Tab -- select in code

Using the MDI Tabs, I can select a different Tab by clicking with mouse on either the Form or the Tab, or slecting from VIEW Menu.

But how can I select a different Tab in code?

(I have tried setting Focus to the Form in a Tab, but although this works for a second, CommandBars then insists on switching back to the original Tab).

SOLUTION:   childForm.ZOrder 0   will select the childForm in code.

oleg wrote: Hi, activate Child Form. Corresponded Tab will be activated automatically.

Thank you.

I had already tried
   childForm.Activate, 
   childForm.Show,
   childForm.Visible = True,
   childForm.SetFocus
but none of these work.

Now I try  childForm.ZOrder 0
and this does work.