property BackgroundStyle: TIEBackgroundStyle;
Specifies the style of the image background (the region of the ImageEnView window that is not filled by the image).
Note: You will only see the background if the image (layer 0) is smaller than the control. If an image has not yet been loaded then the image will be the same size as the control, so to see the background reduce the size of the image, e.g. ImageEnView1.IEBitmap.Allocate( 1, 1 );
ImageEnView1.BackgroundStyle := iebsPhotoLike;