Get PC username and PC name

[AppetiteTeam]

I don't understand how to get username and PC name. Tried like this:

final localeName = calloc<Utf16>();
final user = GetUserDefaultLocaleName(localeName, LOCALE_USER_DEFAULT);

VS Code shows that there are no errors, but when compiling it gives this:

: Error: Expected type 'Utf16' to be a valid and instantiated subtype of 'NativeType'.
package:pc_remote/helpers/media.dart:31

• 'Utf16' is from 'package:ffi/src/utf16.dart' ('/C:/FlutterSDK/.pub-cache/hosted/pub.dartlang.org/ffi-1.1.2/lib/src/utf16.dart').
  package:ffi/src/utf16.dart:1

[timsneath]

That's correct. Utf16 is not a type that can be allocated (it's an opaque type that exists primarily to enable extension methods to convert back to a string). Instead you allocate a native type like Uint16 (which represents 2 bytes of storage, enough for a single Unicode character) and then cast it to a Utf16. And of course, you need enough of them for your buffer (use the optional parameter). For example:

final buffer = calloc<Uint16>(256).cast<Utf16>();

To make it easier, win32 offers a helper method that takes care of these details for you:

final buffer = wsalloc(256);

Saving you a lot of trouble, this example shows how to get the username and machine name:
https://github.com/timsneath/win32/blob/main/example/sysinfo.dart