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...use the autocomplete feature in a combobox?
Autor: Simon Grossenbacher
Homepage: http://www.swissdelphicenter.ch
[ Print tip ]  

Tip Rating (16):  
     


{
  Ever wondered how to make a combobox
  with autocomplete like the one in the explorer?
  The trick is in the CB_FINDSTRING API call.
}


var
  
LastKey: Word;

procedure TForm1.ComboBox1KeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin
  
LastKey := Key;
end;

procedure TForm1.ComboBox1Change(Sender: TObject);
var
  
Srch: string;
  ix: Integer;
begin
  
Srch := combobox1.Text;
  if LastKey = $08 then
  begin
    
LastKey := 0;
    Exit;
  end;
  LastKey := 0;
  ix := combobox1.Perform(CB_FINDSTRING, - 1, Longint(PChar(Srch)));
  if ix > CB_ERR then
  begin
    
combobox1.ItemIndex := ix;
    combobox1.SelStart  := Length(Srch);
    combobox1.SelLength := (Length(combobox1.Text) - Length(Srch));
  end;
end;


 

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