Dim ImageIndex As Int = workbook.PoiWorkbook.AddImage(File.DirAssets, "logo.png")
Dim TopLeft As XLAddress = xl.AddressName("D5")
Dim BottomRight As XLAddress = xl.AddressName("F8")
sheet.PoiSheet.SetImage(ImageIndex, TopLeft.Col0Based, TopLeft.Row0Based, BottomRight.Col0Based, BottomRight.Row0Based)