GetCurrentPackageFamilyName

// KERNEL32.dll
#include <windows.h>

WIN32_ERROR GetCurrentPackageFamilyName(
    DWORD* packageFamilyNameLength,
    LPWSTR packageFamilyName   // optional
);

<DllImport("KERNEL32.dll", ExactSpelling:=True)>
Public Shared Function GetCurrentPackageFamilyName(
    ByRef packageFamilyNameLength As UInteger,   ' DWORD* in/out
    <MarshalAs(UnmanagedType.LPWStr)> packageFamilyName As System.Text.StringBuilder   ' LPWSTR optional, out
) As UInteger
End Function

' packageFamilyNameLength : DWORD* in/out
' packageFamilyName : LPWSTR optional, out
Declare PtrSafe Function GetCurrentPackageFamilyName Lib "kernel32" ( _
    ByRef packageFamilyNameLength As Long, _
    ByVal packageFamilyName As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetCurrentPackageFamilyName = ctypes.windll.kernel32.GetCurrentPackageFamilyName
GetCurrentPackageFamilyName.restype = wintypes.DWORD
GetCurrentPackageFamilyName.argtypes = [
    ctypes.POINTER(wintypes.DWORD),  # packageFamilyNameLength : DWORD* in/out
    wintypes.LPWSTR,  # packageFamilyName : LPWSTR optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetCurrentPackageFamilyName = Fiddle::Function.new(
  lib['GetCurrentPackageFamilyName'],
  [
    Fiddle::TYPE_VOIDP,  # packageFamilyNameLength : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # packageFamilyName : LPWSTR optional, out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn GetCurrentPackageFamilyName(
        packageFamilyNameLength: *mut u32,  // DWORD* in/out
        packageFamilyName: *mut u16  // LPWSTR optional, out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll")]
public static extern uint GetCurrentPackageFamilyName(ref uint packageFamilyNameLength, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder packageFamilyName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetCurrentPackageFamilyName' -Namespace Win32 -PassThru
# $api::GetCurrentPackageFamilyName(packageFamilyNameLength, packageFamilyName)

#uselib "KERNEL32.dll"
#func global GetCurrentPackageFamilyName "GetCurrentPackageFamilyName" sptr, sptr
; GetCurrentPackageFamilyName varptr(packageFamilyNameLength), varptr(packageFamilyName)   ; 戻り値は stat
; packageFamilyNameLength : DWORD* in/out -> "sptr"
; packageFamilyName : LPWSTR optional, out -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

#uselib "KERNEL32.dll"
#cfunc global GetCurrentPackageFamilyName "GetCurrentPackageFamilyName" var, var
; res = GetCurrentPackageFamilyName(packageFamilyNameLength, packageFamilyName)
; packageFamilyNameLength : DWORD* in/out -> "var"
; packageFamilyName : LPWSTR optional, out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; WIN32_ERROR GetCurrentPackageFamilyName(DWORD* packageFamilyNameLength, LPWSTR packageFamilyName)
#uselib "KERNEL32.dll"
#cfunc global GetCurrentPackageFamilyName "GetCurrentPackageFamilyName" var, var
; res = GetCurrentPackageFamilyName(packageFamilyNameLength, packageFamilyName)
; packageFamilyNameLength : DWORD* in/out -> "var"
; packageFamilyName : LPWSTR optional, out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procGetCurrentPackageFamilyName = kernel32.NewProc("GetCurrentPackageFamilyName")
)

// packageFamilyNameLength (DWORD* in/out), packageFamilyName (LPWSTR optional, out)
r1, _, err := procGetCurrentPackageFamilyName.Call(
	uintptr(packageFamilyNameLength),
	uintptr(packageFamilyName),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function GetCurrentPackageFamilyName(
  packageFamilyNameLength: Pointer;   // DWORD* in/out
  packageFamilyName: PWideChar   // LPWSTR optional, out
): DWORD; stdcall;
  external 'KERNEL32.dll' name 'GetCurrentPackageFamilyName';

result := DllCall("KERNEL32\GetCurrentPackageFamilyName"
    , "Ptr", packageFamilyNameLength   ; DWORD* in/out
    , "Ptr", packageFamilyName   ; LPWSTR optional, out
    , "UInt")   ; return: WIN32_ERROR

●GetCurrentPackageFamilyName(packageFamilyNameLength, packageFamilyName) = DLL("KERNEL32.dll", "dword GetCurrentPackageFamilyName(void*, char*)")
# 呼び出し: GetCurrentPackageFamilyName(packageFamilyNameLength, packageFamilyName)
# packageFamilyNameLength : DWORD* in/out -> "void*"
# packageFamilyName : LPWSTR optional, out -> "char*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。