Using Multi-Byte in place of Unicode

[squidge]

There's two versions of CreateFile:
CreateFileA takes a ASCII parameters (char *)
CreateFileW takes Unicode parameters (wchar *)

Typically, if you have Unicode defined, CreateFileW is aliases to CreateFile, else CreateFileA is aliased to CreateFile.

You can still use either by using the proper names:

QString foo = "\\\\.\\COM1";
CreateFileW(foo.utf16(), ...)

QString foo = "\\\\.\\COM1";
CreateFileW(foo.utf16(), ...)

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char foo[] = "\\\\.\\COM1";
CreateFileA(foo, ...)

char foo[] = "\\\\.\\COM1";
CreateFileA(foo, ...)

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