public static void EnableAutoSuggest(ComboBox tb, string[] suggestions)
{
// Create and assign the autocomplete source
// Try to enable a more advanced settings for AutoComplete via the WinShell interface
try
{
var source = new SourceCustomList()
{
StringList = suggestions.ToArray()
};
// For options descriptions see:
// https://docs.microsoft.com/en-us/windows/desktop/api/shldisp/ne-shldisp-_tagautocompleteoptions
var options = AUTOCOMPLETEOPTIONS.ACO_UPDOWNKEYDROPSLIST | AUTOCOMPLETEOPTIONS.ACO_USETAB |
/* AUTOCOMPLETEOPTIONS.ACO_AUTOAPPEND | */ AUTOCOMPLETEOPTIONS.ACO_AUTOSUGGEST | AUTOCOMPLETEOPTIONS.ACO_WORD_FILTER;
AutoCompleteExt.Enable(tb.Handle, source, options);
}
catch (Exception)
{
// Incase of an error, let's fall back to the default
var source = new AutoCompleteStringCollection();
source.AddRange(suggestions);
tb.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
tb.AutoCompleteSource = AutoCompleteSource.CustomSource;
tb.AutoCompleteCustomSource = source;
}
}
// This method creates another enumerator that contains the same enumeration
// state as the current one. Using this function, a client can record a
// particular point in the enumeration sequence and return to that point at a
// later time. The new enumerator supports the same interface as the original one.
public void Clone(
out UCOMIEnumString ppenum) // Address of the IEnumString pointer
// variable that receives the interface
// pointer to the enumeration object. If
// the method is unsuccessful, the value
// of this output variable is undefined.
{
SourceCustomList clone = new SourceCustomList
{
currentPosition = currentPosition,
StringList = (String[])StringList.Clone()
};
ppenum = clone;
}
public static void Enable(IntPtr controlHandle, SourceCustomList items, AUTOCOMPLETEOPTIONS options)
{
if (controlHandle == IntPtr.Zero)
{
return;
}
IAutoComplete2 iac = null;
try
{
iac = (IAutoComplete2)GetAutoComplete();
int ret = iac.Init(controlHandle, items, "", "");
ret = iac.SetOptions(options);
ret = iac.Enable(true);
}
finally
{
if (iac != null)
{
Marshal.ReleaseComObject(iac);
}
}
}