Explorer.ClearSelection Method (Outlook)
Cancels any selection in the active explorer.
After the ClearSelection method is called, the Count property of the Selection object that the Explorer.Selection property returns is zero. Then, the SelectionChange event fires unless prior to calling of ClearSelection, the current view did not contain any items, the current folder was empty, or the Count property was already zero.
If the Reading Pane is visible and the current view is a table view, calling ClearSelection renders the Reading Pane blank.
If the current view or current folder does not contain any items, calling ClearSelection does not result in any change to the selection and does not fire the SelectionChange event.
ClearSelection returns an error if the item is being edited in the current view.