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IShellFolderViewCB::MessageSFVCB method (shlobj_core.h)

  • Article

Allows communication between the system folder view object and a system folder view callback object.

Syntax

HRESULT MessageSFVCB(
  [in] UINT   uMsg,
       WPARAM wParam,
       LPARAM lParam
);

Parameters

[in] uMsg

Type: UINT

One of the following notifications.

Notification Usage
SFVM_ADDPROPERTYPAGES Allows the callback object to provide a page to add to the Properties property sheet of the selected object.
SFVM_BACKGROUNDENUM Allows the callback object to request that enumeration be done on a background thread.
SFVM_BACKGROUNDENUMDONE Notifies the callback object that background enumeration is complete.
SFVM_COLUMNCLICK Notifies the callback object that the user has clicked a column header to sort the list of objects in the folder view.
SFVM_DEFITEMCOUNT Allows the callback object to specify the number of items in the folder view.
SFVM_DEFVIEWMODE Allows the callback object to specify the view mode.
SFVM_DIDDRAGDROP Notifies the callback function that a drag-and-drop operation has begun.
SFVM_FSNOTIFY Notifies the callback object that an event has taken place that affects one of its items.
SFVM_GETANIMATION Allows the callback object to specify that an animation be displayed while items are enumerated on a background thread.
SFVM_GETBUTTONINFO Allows the callback object to add buttons to the toolbar.
SFVM_GETBUTTONS Allows the callback object to specify the buttons to be added to the toolbar.
SFVM_GETDETAILSOF Allows the callback object to provide the details for an item in a Shell folder. Use only if a call to GetDetailsOf fails and there is no GetDetailsOf method available to call.
SFVM_GETHELPTEXT Allows the callback object to specify a help text string for menu items or toolbar buttons.
SFVM_GETHELPTOPIC Allows the callback object to specify a Help file and topic.
SFVM_GETNOTIFY Specifies which events will generate an SFVM_FSNOTIFY message for a given item.
SFVM_GETPANE Allows the callback object to provide the status bar pane in which to display the Internet zone information.
SFVM_GETSORTDEFAULTS Allows the callback object to specify default sorting parameters.
SFVM_GETTOOLTIPTEXT Allows the callback object to specify a tooltip text string for menu items or toolbar buttons.
SFVM_GETZONE Allows the callback object to provide Internet zone information.
SFVM_INITMENUPOPUP Allows the callback object to modify an item's context menu.
SFVM_INVOKECOMMAND Notifies the callback object that one of its toolbar or menu commands has been invoked.
SFVM_MERGEMENU Allows the callback object to merge menu items into the Windows Explorer menus.
SFVM_QUERYFSNOTIFY Allows the callback object to register a folder so that changes to that folder's view will generate notifications.
SFVM_SETISFV Notifies the callback object of the container site. This is used only when IObjectWithSite::SetSite is not supported and SHCreateShellFolderViewEx is used.
SFVM_SIZE Notifies the callback object that the folder view has been resized.
SFVM_THISIDLIST Allows the callback object to specify the view's PIDL. This is used only when SetIDList and IPersistFolder2::GetCurFolder have failed.
SFVM_UNMERGEMENU Notifies the callback object that a menu is being removed.
SFVM_UPDATESTATUSBAR Allows the callback object to request that the status bar be updated.
SFVM_WINDOWCREATED Notifies the callback object that the folder view window is being created.

wParam

Type: WPARAM

Additional information. See the individual notification pages for specific requirements.

lParam

Type: LPARAM

Additional information. See the individual notification pages for specific requirements.

Return value

Type: HRESULT

This method can return one of these values.

Return code Description
S_OK
 The notification has been handled.
E_NOTIMPL
 The message has not been handled and the system folder view object should perform default processing.

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header shlobj_core.h
DLL Shell32.dll