XRObservableCollection.CreateInstance(XRObservableCollection * *) (Compact 7)

3/12/2014

This method returns an XRObservableCollection<ItemType> object instance that also supports functionality that resembles the Component Object Model (COM) and exposes interfaces defined in the interface map to callers of XRObject.QueryInterface(const IID&,void * *).

Syntax

HRESULT CreateInstance(
XRObservableCollection * * ppCollection)

Parameters

• ppCollection
  [out] A pointer to an XRObservableCollection<ItemType> object instance.

Return Value

The following table shows the possible return values.

The E_OUTOFMEMORY value is returned when the system does not have enough memory to create an object instance.

The E_OUTOFMEMORY and E_FAIL values are returned in two different situations:

• E_OUTOFMEMORY is returned if the method was able to process the ppCollection input parameter for the internal call to create an instance; however, the method was unable to create the instance by using the input parameter.
• E_FAIL is returned by the method’s internal call to create an instance if none of its if statements were evaluated by the method. When E_FAIL is returned, none of the code in the internal call to create an instance was processed.

Remarks

In addition to the methods on XRObservableCollection<ItemType>, the object instance in ppCollection supports the methods XRObject.QueryInterface(const IID&,void * *), XRObject.AddRef, and XRObject.Release. It also supports the following interfaces for callers of XRObject.QueryInterface(const IID&,void * *):

• IXRNotifyCollectionChanged
• IXRList
• IXRValueCollection
• IXREnumerable

For more information about the interface map, see Remarks in XRObservableCollection<ItemType>.

This method uses the XRObject<Base> helper class to create the object instance.

Requirements

See Also

Reference

XRObservableCollection<ItemType>