In the main form, when the form load I created a new form and added it to WinTabbedMdi tab.
How to set this form as deafult home page tab (locked tab) without close, drag drop...?
I'm not sure that I understand what you want to do. You can set a tab to be the Active tab by calling the Activate method on it. So, you could do something like this:
ultraTabbedMdiManager1.MdiParent.MdiChildren[0].Activate();
Does that give you what you want?
Thank you for your response.
Whats I want is how to make the (first) tab persistent,means that it can not close, while others tab can close.
You can see an example here: https://www.devexpress.com/Support/Center/Example/Details/E2331