Problem of the FNC Ribbon Form's borderline

Dear TMS, 

Hello, This is JH Jang from Korea.

When uses the same theme in a main form and a dialog,  the same color assigned to main form's Ribbon color to the color of dialog form's borderline. 
It looks like the followings:

The outlook or the other MS application was solving use the shadow effect.

Could you give any advice on this issue?

Thank you.

At this moment we do not have a setting to have a shadow around the form. We've added it on the list for investigation.

Thank you.