Hello Dzyann,

 I have been looking into your issue. The IG theme could be added to your project and you can modify the PaneTabItem from there. You can find the theme under the following path on your computer: C:\Program Files\Infragistics\NetAdvantage 2013.1\WPF\Themes\IG. Them add it as a ResourceDictionary for the controls to use.

Please do not hesitate to let me know if you have any further questions on the matter.

Thanks, we were not able to use the style for the PaneTabItem to change the borders.

I think partially is because how our project is structured, but I think it is due to the way the headers of the tabs are built, are rather complex.

Thank you!

Hello Dzyann,

 I am just checking your progress on the issue. Please do not hesitate to let me know if you have any further questions on the matter.

Hello Dzyann,

 I have been able to reproduce the issue. The IG theme is designed to look that way. You can check this from the samples browser installed on your computer together with our components. Setting a style for the PaneTabItemyou can see that the border is there and its background color if set to transparent.  If you want to set a border you have to create a style for the PaneTabItem. You can see the default style for an active tab from the default styles, also installed on your computer with our components. Here is a path to the styles: C:\Program Files\Infragistics\NetAdvantage 2013.1\WPF\DefaultStyles\DockManager.

Please do not hesitate to let me know if you have any further  questions on the matter.

Hi Gergana!

The problem I have is that I don't have a place where i could easily upload things.
In the sample application you sent me I could see that the Themes were not being used at all. When you change the Theme, for example to the Metro one? Does it get applied?

Because I tried changing the themes in the sample app you uploaded and i couldn't make it work.

Thanks again for your quick response.