MSW: window ids limited to 16 bits?

[Harry]

wxWindowBase::CreateBase() limits window ids to 16 bits, claiming that
"ids are limited to 16 bits under MSW".

As far as I know, MSW window ids are 32 bits, and this has been the case 
for quite a long time.

Is there any reason for keeping this restriction ?
In my case I've erased this from the code, and everything works just 
fine with ids larger than 16 bits.

Regards
Harry