Hello Charlie,

Thank you for your post. I have been looking into it and I created a sample project for you with the functionality you want. Basically I copied the default Style of the XamZoombar and change the background of a border in its template so now it is transparent. I also reduce the width of the left and right borders. Please let me know if this helps you or you need further assistance on this matter.

Looking forward for your reply.

Hi Stefan ,

Thanks for your response, and where can I find the default style of these control?

Hello Charlie,

You can find the default Styles here by default:

C:\Program Files (x86)\Infragistics\NetAdvantage 2013.1\WPF\DefaultStyles

Thanks.  

So if I want to implement this functionality, I have to copy this default style into my XAML file, and do some change? Because I find that the default style xaml code is about 900 line~~~

Hello Charlie,

Yes that is right, because the XamZoombar is a complicated control and the border you want to make thinner is in fact a custom control. You can also add a ResourceDictionary and put the Style there, if you don't want to put it in XAML.

Hope this helps you. 

OK.   Thanks for your help. ^_^