Interop.TBarCodeDll.BCSetFuncDrawRing
unsafe int TECIT.TBarCode.Interop.TBarCodeDll.BCSetFuncDrawRing(IntPtr barcode, DrawRingCallback drawRingCallback)unsafe int TECIT.TBarCode.Interop.TBarCodeDll.BCSetFuncDrawRing(IntPtr barcode, DrawRingCallback drawRingCallback)