ID3D12Object::GetPrivateData method (d3d12.h)
Gets application-defined data from a device object.
HRESULT GetPrivateData( [in] REFGUID guid, [in, out] UINT *pDataSize, [out, optional] void *pData );
The GUID that is associated with the data.
[in, out] pDataSize
A pointer to a variable that on input contains the size, in bytes, of the buffer that pData points to, and on output contains the size, in bytes, of the amount of data that GetPrivateData retrieved.
[out, optional] pData
A pointer to a memory block that receives the data from the device object if pDataSize points to a value that specifies a buffer large enough to hold the data.
This method returns one of the Direct3D 12 Return Codes.
If the data returned is a pointer to an IUnknown, or one of its derivative classes, which was previously set by SetPrivateDataInterface, that interface will have its reference count incremented before the private data is returned.