I'm trying to get a handle for a TComponent descendent class under GTK2.

On Tmyclass.Create(..) I did:

begin
   ...
   fHandle := AllocateHWnd(wndMessagesMethod);
   ...
end;

But when I call

   PostMessage(objectofMyClass.fhandle, LM_MYMESSAGE,0,0);

I got the exception:

"GetLCLObject=nil"

So, what's the correct way to get a handle for a TComponent?