[oesqueda]

Porque no mejor usas la funcion Format


const
FILTRO = '(TicketID) LIKE "*%d*") OR (Usuario) LIKE ("*%s*")';
var
sCad:string;

if edtBuscar.Text<> '' then
begin
with ADOTableTicket do
begin
Close;
Filtered:= False;

sCad := Format(FILTRO, [Tiq, usu]);
Filter:= sCad;

Filtered:= True;

Open;
end
end