From Xojo Documentation
Class (inherits from IUnknown)
| This class is only available on the Windows platform.
For cross-platform compatibility, use ＃If...＃Endif with the Target... specifiers to make sure you will not attempt to use this class on an incompatible platform.
IPicture is the primary interface implemented by the OLE-provided picture object. It allows the caller to manage picture properties and to use that picture in graphical rendering.