Fix all warnings for nvapi project in x64.

This includes using secure crt specs to auto-fix a bunch for the x64.
Define directinput as 800.
Fix warnings in printfs from printing pointers from %x to %p.
Remove double declspec export for nvapi_QueryInterface.
Fix crash from wrong size string in ReplaceShader.

From the wscpy_s change.  It's wide, not small.  Using sizeof now instead, be more sensible.