I got a main form that have one spliter and another spliter inside of the second. I want the ultra tabbedmdimanager to open in the Panel 2 of my second splitter. Can I do that?
No, the UltraTabbedMdiManager will only work with a Form which is an MDI parent. The UltraTabbedMdiManager will take up the entire area of the MDIClient control added to the client area of the Form. You might be able to achieve this by docking controls to the sides of the parent form and then adding Splitter controls docked next to them.