Enables a client to determine the contents of a folder by creating an item identifier enumeration object and returning its IEnumIDList interface. The methods supported by that interface can then be used to enumerate the folder's contents.
HRESULT EnumObjects( HWND hwnd, SHCONTF grfFlags, IEnumIDList **ppenumIDList );
If user input is required to perform the enumeration, this window handle should be used by the enumeration object as the parent window to take user input. An example would be a dialog box to ask for a password or prompt the user to insert a CD or floppy disk. If hwndOwner is set to NULL, the enumerator should not post any messages, and if user input is required, it should silently fail.
Flags indicating which items to include in the enumeration. For a list of possible values, see the SHCONTF enumerated type.
The address that receives a pointer to the IEnumIDList interface of the enumeration object created by this method. If an error occurs or no suitable subobjects are found, ppenumIDList is set to NULL.
S_OK if successful, or an error value otherwise. Some implementations may also return
S_FALSE, indicating that there are no children matching the grfFlags that were passed in. If
S_FALSE is returned, ppenumIDList is set to
If the method returns S_OK, then ppenumIDList receives a pointer to an enumerator. In this case, the calling application must free the returned IEnumIDList object by calling its Release method.
If the method returns S_FALSE, then the folder contains no suitable subobjects and the pointer specified in ppenumIDList is set to NULL.
If the method fails, an error value is returned and the pointer specified in ppenumIDList is set to NULL.
If the folder contains no suitable subobjects, then the IShellFolder::EnumObjects method is permitted either to set *ppenumIDList to NULL and return S_FALSE, or to set *ppenumIDList to an enumerator that produces no objects and return S_OK. Calling applications must be prepared for both success cases.
|Minimum supported client||Windows XP [desktop apps only]|
|Minimum supported server||Windows 2000 Server [desktop apps only]|
|Header||shobjidl_core.h (include Shobjidl.h)|
|DLL||Shell32.dll (version 4.0 or later)|