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Shell API Notifications

  • Article

4/8/2010

The following table shows the Shell API notifications, with a description of the purpose of each.

Programming element Description

DLN_COPY

This notification message is currently not implemented.

DLN_DELETINGSEL

This notification message is sent prior to the deletion of a file from the document list; the path name is sent with the message header, allowing the application to close the file if it is currently open.

DLN_DOWN

This notification message is sent to indicate the VK_DOWN key was pressed while the document list view was open.

DLN_ESCAPE

This notification message is sent to indicate the Escape key was pressed while the document list view was open. It is up to each application to handle this event.

DLN_FILECHANGEINFO

This notification message is sent when the document list receives a WM_FILECHANGEINFO message.

DLN_FOLDER

This notification message is sent when a new folder is selected in the document list view; the path name of the folder is passed along with this notification.

DLN_ITEMACTIVATED

This notification message is sent to indicate an item has been clicked or tapped; a path name is sent with this notification.

DLN_ITEMCHANGED

This notification message is sent to indicate that an item in the document list view has changed.

DLN_ITEMCHANGING

This notification message is sent to indicate that an item in the document list view is currently changing.

DLN_NOHIT

This notification message is sent when a LVN_ITEMCHANGED notification message is received and no item is currently selected in the document list view.

DLN_NOITEMS

This notification message is sent to indicate that no files are contained in the document list view and that the application should update the interface to reflect the lack of files (disable the Property button, for example).

DLN_POSTUPDATE

This notification message is sent just after the document list is updated.

DLN_PREDELETESEL

This notification message is sent prior to the deletion of one or more elements in the document list.

DLN_PREUPDATE

This notification message is sent just before the document list is updated.

DLN_PRINT

This notification message is sent when the Print command is selected from the context menu; the path name of the file to be printed is passed along with this notification.

DLN_PROP

This notification message is currently not implemented.

DLN_UP

This notification message is sent to indicate the VK_UP key was pressed while the document list view was open.

GN_CONTEXTMENU

This notification message is sent in the form of a WM_NOTIFY message.

NM_RECOGNIZEGESTURE

This notification message is sent to allow the application to decide if it wants automatic gesture recognition in common controls or not.

SH_UIMETRIC_CHANGE

This notification is sent to an application when the user changes the text size from the Screen control panel application.

WM_FILECHANGEINFO

Sent (by SendNotifyMessage from the shell) to the window that was registered with SHChangeNotifyRegister.

See Also

Concepts

Shell Reference (Windows Mobile)