.ProductID              = 0x204F,
        .ReleaseNumber          = VERSION_BCD(00.01),
 
-       .ManufacturerStrIndex   = 0x01,
-       .ProductStrIndex        = 0x02,
+       .ManufacturerStrIndex   = STRING_ID_Manufacturer,
+       .ProductStrIndex        = STRING_ID_Product,
        .SerialNumStrIndex      = NO_DESCRIPTOR,
 
        .NumberOfConfigurations = FIXED_NUM_CONFIGURATIONS
                case DTYPE_String:
                        switch (DescriptorNumber)
                        {
-                               case 0x00:
+                               case STRING_ID_Language:
                                        Address = &LanguageString;
                                        Size    = pgm_read_byte(&LanguageString.Header.Size);
                                        break;
-                               case 0x01:
+                               case STRING_ID_Manufacturer:
                                        Address = &ManufacturerString;
                                        Size    = pgm_read_byte(&ManufacturerString.Header.Size);
                                        break;
-                               case 0x02:
+                               case STRING_ID_Product:
                                        Address = &ProductString;
                                        Size    = pgm_read_byte(&ProductString.Header.Size);
                                        break;