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DEFCONTEXTMENU structure (shlobj_core.h)

  • Άρθρο

Contains context menu information used by SHCreateDefaultContextMenu.

Syntax

typedef struct {
  HWND                  hwnd;
  IContextMenuCB        *pcmcb;
  PCIDLIST_ABSOLUTE     pidlFolder;
  IShellFolder          *psf;
  UINT                  cidl;
  PCUITEMID_CHILD_ARRAY apidl;
  IUnknown              *punkAssociationInfo;
  UINT                  cKeys;
  const HKEY            *aKeys;
} DEFCONTEXTMENU;

Members

hwnd

Type: HWND

A handle to the context menu. Set this member to the handle returned from CreateMenu.

pcmcb

Type: IContextMenuCB*

A pointer to the IContextMenuCB interface supported by the callback object. This value is optional and can be NULL.

pidlFolder

Type: PCIDLIST_ABSOLUTE

The PIDL of the folder that contains the selected file object(s) or the folder of the context menu if no file objects are selected. This value is optional and can be NULL, in which case the PIDL is computed from the psf member.

psf

Type: IShellFolder*

A pointer to the IShellFolder interface of the folder object that contains the selected file objects, or the folder that contains the context menu if no file objects are selected.

cidl

Type: UINT

The count of items in member apidl.

apidl

Type: PCUITEMID_CHILD_ARRAY

A pointer to a constant array of ITEMIDLIST structures. Each entry in the array describes a child item to which the context menu applies, for instance, a selected file the user wants to Open.

punkAssociationInfo

Type: IUnknown*

A pointer to the IQueryAssociations interface on the object from which to load extensions. This parameter is optional and thus can be NULL. If this value is NULL and members aKeys and cKeys are also NULL (see Remarks), punkAssociationInfo is computed from the apidl member and cidl via a request for IQueryAssociations through IShellFolder::GetUIObjectOf.

If IShellFolder::GetUIObjectOf returns E_NOTIMPL, a default implementation is provided based on the SFGAO_FOLDER and SFGAO_FILESYSTEM attributes returned from IShellFolder::GetAttributesOf.

cKeys

Type: UINT

The count of items in member aKeys. This value can be zero. If the value is zero, the extensions are loaded based on the object that supports interface IQueryAssociations as specified by member punkAssociationInfo. If the value is non-NULL, the extensions are loaded based only on member aKeys and not member punkAssociationInfo.

Note  The maximum number of keys is 16. Callers must enforce this limit as the API does not. Failing to do so can result in memory corruption.
 

aKeys

Type: const HKEY*

A pointer to an HKEY that specifies the registry key from which to load extensions. This parameter is optional and can be NULL. If the value is NULL, the extensions are loaded based on the object that supports interface IQueryAssociations as specified in punkAssociationInfo.

Remarks

If the aKeys and cKeys members are valid and member punkAssociationInfo is also valid (not NULL), the system constructs the menu using the values of aKeys and cKeys, and ignores member punkAssociationInfo (IQueryAssociations).

Members apidl and cidl can be used as parameters to method IShellFolder::GetUIObjectOf to retrieve IDataObject.

Requirements

Requirement Value
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2008 [desktop apps only]
Header shlobj_core.h (include Shlobj.h)