user32: Add a test for ToUnicode - Win9x behaviour

[Nikolay Sivov]

Andre Wisplinghoff wrote:
> Hello,
>
> I think my patch [1] shouldn't be applied, because I didn't think about 
> older versions of Windows. According to MSDN, ToUnicode has NT 3.1 as a 
> minimum, meaning we should test if the function is unimplemented and 
> skip the test in this case (Win9x Systems). Unfortunately I don't have a 
> Win9x system ready for testing at the moment. Is adding the following 
> after the first call to ToUnicode enough to handle this issue?
>
> if (GetLastError() == ERROR_CALL_NOT_IMPLEMENTED)
> {
>     trace("Skipping the ToUnicode test on a Win9x platform\n");
>     return;
> }
>
> Best Regards
> -- Andre Wisplinghoff
>
> [1] http://www.winehq.org/pipermail/wine-patches/2008-July/058745.html
>
>
>   
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