IEnumString (Windows Embedded CE 6.0)

1/6/2010

This interface enumerates strings. The LPWSTR data type indicates a pointer to a zero-terminated string of wide, or Unicode, characters.

IEnumString has the same methods as all enumerator interfaces: Next, Skip, Reset, and Clone. For general information on these methods, refer to IEnumXXXX.

When to Implement

It is usually not necessary to implement this interface unless you have use for a custom string enumerator.

A system implementation in the bind context object that exposes the IBindCtx interface also contains an implementation of IEnumString.

The IBindCtx::EnumObjectParam method returns a pointer to this IEnumString interface on an enumerator that can return the keys of the bind context's string-keyed table of pointers.

When to Use

Call the methods of IEnumString to enumerate through a set of strings.

Methods

The following table shows the methods for this interface in vtable order.

IUnknown method	Description
QueryInterface	Returns pointers to supported interfaces.
AddRef	Increments reference count.
Release	Decrements reference count.

Method	Description
Next	Retrieves a specified number of items in the enumeration sequence.
Skip	Skips a specified number of items in the enumeration sequence.
Reset	Resets the enumeration sequence to the beginning.
Clone	Creates another enumerator that contains the same enumeration state as the current one.

Remarks

To determine whether the platform supports this interface, see Determining Supported COM APIs.

Requirements

Header	objidl.h, objidl.idl
Library	ole32.lib, uuid.lib
Windows Embedded CE	Windows CE 2.0 and later

See Also

Reference

COM Interfaces