* cleaning
The icon gets created but GetLastError always returns
ERROR_INVALID_WINDOW_HANDLE, at least under win7.
We should be fine with callbacks' ABI as they are defined outside ctypes-utils.
Does nothing particular, except get few informations from the registeredwindow.
ctypes-utils.jsm needs to be ironed out (ABI used for .so version and lib type
for .dll), and we'll probably have problems when declaring callbacks
(ctypes.stdcall_abi on 32bits ?).
foudfou