Windows "type into list view" timer customization
From Default List-View Message Processing in the Windows SDK.
Message Processing
The following table describes the window message processing performed by a list-view control.
Message Processing performed
WM_CHARSearches for a list-view item that begins with the specified character and, if the item is found, selects and sets the focus to the item.Multiple characters received within a time-out interval, currently fixed at one second, are concatenated, and the list-view control searches for an item that begins with the resulting string.