wenn der Style "csDropDownList" ist geht folgendes
Delphi-Quellcode:
procedure Search(AHandle: Cardinal; AText: String);
var LChar: String;
LCount: Integer;
begin
for LCount := 1 to Length(AText) do
PostMessage(AHandle, WM_CHAR, Integer(AText[LCount]), 0);
end;
[...]
Search(Combobox1.Handle, 'Wortanfang');