0x0004. Add a search item to the list of completed strings. When the user selects this item, it launches a search engine.
0x0008. Do not match common prefixes, such as "www." or "http://".
0x0010. Use the TAB key to select an item from the drop-down list.
0x0020. Use the UP ARROW and DOWN ARROW keys to display the autosuggest drop-down list.
0x0040. Normal windows display text left-to-right (LTR). Windows can be mirrored to display languages such as Hebrew or Arabic that read right-to-left (RTL). Typically, control text is displayed in the same direction as the text in its parent window. If ACO_RTLREADING is set, the text reads in the opposite direction from the text in the parent window.
0x0080. Windows Vista and later. If set, the autocompleted suggestion is treated as a phrase for search purposes. The suggestion, Microsoft Office, would be treated as "Microsoft Office" (where both Microsoft AND Office must appear in the search results).
0x0100. Windows Vista and later. Disable prefix filtering when displaying the autosuggest dropdown. Always display all suggestions.
Minimum supported client
Windows 2000 Professional with SP3 [desktop apps only]