Add winapi-family part to this sub-interface part 1 for strmif.idl update


git-svn-id: svn://svn.code.sf.net/p/mingw-w64/code/trunk@6126 4407c894-4637-0410-b4f5-ada5f102cad1
Add winfamily support ... rewrite of sub-interface (plus Wine-specific hacks).


git-svn-id: svn://svn.code.sf.net/p/mingw-w64/code/trunk@6127 4407c894-4637-0410-b4f5-ada5f102cad1