You can't. There's lots of implicit state that isn't encapsulated in DLL files.
(I'm assuming you're talking about TTS engines, not speech recognition engines. The SR engines haven't been updated from Windows 7 to Windows 8.1.)
题
How can I use standard built'in windows8.1's voice engines (speech engines) on my Windows 7? Should I install any SDKs or manually move some files (dll files, etc) to windows 7 and use them directly?
解决方案
You can't. There's lots of implicit state that isn't encapsulated in DLL files.
(I'm assuming you're talking about TTS engines, not speech recognition engines. The SR engines haven't been updated from Windows 7 to Windows 8.1.)