| Overload | Description |
|---|---|
| GetReferenceKey() | Obtains the reference to the reference key of a font file. The returned reference is valid until the font file object is released. |
| GetReferenceKey(IntPtr) | HRESULT IDWriteFontFile::GetReferenceKey([Out, Buffer] const void** fontFileReferenceKey,[Out] unsigned int* fontFileReferenceKeySize) |