Hi, i have a TTMSFNCTabSet on a TPanel. How can i disable the white border?

TMSFNCTabSet1.BevelOuter := TBevelCut.bvNone;
TMSFNCTabSet1.BevelInner := TBevelCut.bvNone;
TMSFNCTabSet1.BevelKind := TBevelKind.bkNone;
don't help
Hi, i have a TTMSFNCTabSet on a TPanel. How can i disable the white border?

TMSFNCTabSet1.BevelOuter := TBevelCut.bvNone;
TMSFNCTabSet1.BevelInner := TBevelCut.bvNone;
TMSFNCTabSet1.BevelKind := TBevelKind.bkNone;
don't help
TMSFNCTabSet1.DisableBackground;