property Thumbnail.AutoUpdate as Boolean
Determines whether the control automatically updates the thumbnail's view being changed externally.

TypeDescription
Boolean A Boolean expression that determines whether the control automatically updates the thumbnail's view being changed externally.
By default, the AutoUpdate property is False. The AutoUpdate property indicates whether the control automatically updates the thumbnail's view being changed externally. Once the AutoUpdate property is True, the control automatically regenerates the thumbnails for files being changed in the current view. The VirtualMode property specifies whether the control is running in virtual mode.