# IBM Visualization Data Explorer Programmer's Reference

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## 12.5 Private Class

Private Objects are an extension mechanism for storing data in the form of Objects. They are useful, for example, in the cache interface, where cached items must be Objects. The user is responsible for maintaining the data. In particular, the code creating a Private Object should also specify a deletion routine that will be called by the executive when the Object is deleted (to free, for example, any allocated private memory).

`Private DXNewPrivate()` | Creates an Object that contains private data. See DXNewPrivate.
`Pointer DXGetPrivateData()` | Returns the private data pointer associated with a Private Object. See DXGetPrivateData.

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