GetCurrentPackageInfo2

// api-ms-win-appmodel-runtime-l1-1-3.dll
#include <windows.h>

WIN32_ERROR GetCurrentPackageInfo2(
    DWORD flags,
    PackagePathType packagePathType,
    DWORD* bufferLength,
    BYTE* buffer,   // optional
    DWORD* count   // optional
);

<DllImport("api-ms-win-appmodel-runtime-l1-1-3.dll", ExactSpelling:=True)>
Public Shared Function GetCurrentPackageInfo2(
    flags As UInteger,   ' DWORD
    packagePathType As Integer,   ' PackagePathType
    ByRef bufferLength As UInteger,   ' DWORD* in/out
    buffer As IntPtr,   ' BYTE* optional, out
    count As IntPtr   ' DWORD* optional, out
) As UInteger
End Function

' flags : DWORD
' packagePathType : PackagePathType
' bufferLength : DWORD* in/out
' buffer : BYTE* optional, out
' count : DWORD* optional, out
Declare PtrSafe Function GetCurrentPackageInfo2 Lib "api-ms-win-appmodel-runtime-l1-1-3" ( _
    ByVal flags As Long, _
    ByVal packagePathType As Long, _
    ByRef bufferLength As Long, _
    ByVal buffer As LongPtr, _
    ByVal count 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

GetCurrentPackageInfo2 = ctypes.windll.LoadLibrary("api-ms-win-appmodel-runtime-l1-1-3.dll").GetCurrentPackageInfo2
GetCurrentPackageInfo2.restype = wintypes.DWORD
GetCurrentPackageInfo2.argtypes = [
    wintypes.DWORD,  # flags : DWORD
    ctypes.c_int,  # packagePathType : PackagePathType
    ctypes.POINTER(wintypes.DWORD),  # bufferLength : DWORD* in/out
    ctypes.POINTER(ctypes.c_ubyte),  # buffer : BYTE* optional, out
    ctypes.POINTER(wintypes.DWORD),  # count : DWORD* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('api-ms-win-appmodel-runtime-l1-1-3.dll')
GetCurrentPackageInfo2 = Fiddle::Function.new(
  lib['GetCurrentPackageInfo2'],
  [
    -Fiddle::TYPE_INT,  # flags : DWORD
    Fiddle::TYPE_INT,  # packagePathType : PackagePathType
    Fiddle::TYPE_VOIDP,  # bufferLength : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # buffer : BYTE* optional, out
    Fiddle::TYPE_VOIDP,  # count : DWORD* optional, out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "api-ms-win-appmodel-runtime-l1-1-3")]
extern "system" {
    fn GetCurrentPackageInfo2(
        flags: u32,  // DWORD
        packagePathType: i32,  // PackagePathType
        bufferLength: *mut u32,  // DWORD* in/out
        buffer: *mut u8,  // BYTE* optional, out
        count: *mut u32  // DWORD* optional, out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("api-ms-win-appmodel-runtime-l1-1-3.dll")]
public static extern uint GetCurrentPackageInfo2(uint flags, int packagePathType, ref uint bufferLength, IntPtr buffer, IntPtr count);
"@
$api = Add-Type -MemberDefinition $sig -Name 'api-ms-win-appmodel-runtime-l1-1-3_GetCurrentPackageInfo2' -Namespace Win32 -PassThru
# $api::GetCurrentPackageInfo2(flags, packagePathType, bufferLength, buffer, count)

#uselib "api-ms-win-appmodel-runtime-l1-1-3.dll"
#func global GetCurrentPackageInfo2 "GetCurrentPackageInfo2" sptr, sptr, sptr, sptr, sptr
; GetCurrentPackageInfo2 flags, packagePathType, varptr(bufferLength), varptr(buffer), varptr(count)   ; 戻り値は stat
; flags : DWORD -> "sptr"
; packagePathType : PackagePathType -> "sptr"
; bufferLength : DWORD* in/out -> "sptr"
; buffer : BYTE* optional, out -> "sptr"
; count : DWORD* 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 "api-ms-win-appmodel-runtime-l1-1-3.dll"
#cfunc global GetCurrentPackageInfo2 "GetCurrentPackageInfo2" int, int, var, var, var
; res = GetCurrentPackageInfo2(flags, packagePathType, bufferLength, buffer, count)
; flags : DWORD -> "int"
; packagePathType : PackagePathType -> "int"
; bufferLength : DWORD* in/out -> "var"
; buffer : BYTE* optional, out -> "var"
; count : DWORD* 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 GetCurrentPackageInfo2(DWORD flags, PackagePathType packagePathType, DWORD* bufferLength, BYTE* buffer, DWORD* count)
#uselib "api-ms-win-appmodel-runtime-l1-1-3.dll"
#cfunc global GetCurrentPackageInfo2 "GetCurrentPackageInfo2" int, int, var, var, var
; res = GetCurrentPackageInfo2(flags, packagePathType, bufferLength, buffer, count)
; flags : DWORD -> "int"
; packagePathType : PackagePathType -> "int"
; bufferLength : DWORD* in/out -> "var"
; buffer : BYTE* optional, out -> "var"
; count : DWORD* 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 (
	api_ms_win_appmodel_runtime_l1_1_3 = windows.NewLazySystemDLL("api-ms-win-appmodel-runtime-l1-1-3.dll")
	procGetCurrentPackageInfo2 = api_ms_win_appmodel_runtime_l1_1_3.NewProc("GetCurrentPackageInfo2")
)

// flags (DWORD), packagePathType (PackagePathType), bufferLength (DWORD* in/out), buffer (BYTE* optional, out), count (DWORD* optional, out)
r1, _, err := procGetCurrentPackageInfo2.Call(
	uintptr(flags),
	uintptr(packagePathType),
	uintptr(bufferLength),
	uintptr(buffer),
	uintptr(count),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function GetCurrentPackageInfo2(
  flags: DWORD;   // DWORD
  packagePathType: Integer;   // PackagePathType
  bufferLength: Pointer;   // DWORD* in/out
  buffer: Pointer;   // BYTE* optional, out
  count: Pointer   // DWORD* optional, out
): DWORD; stdcall;
  external 'api-ms-win-appmodel-runtime-l1-1-3.dll' name 'GetCurrentPackageInfo2';

result := DllCall("api-ms-win-appmodel-runtime-l1-1-3\GetCurrentPackageInfo2"
    , "UInt", flags   ; DWORD
    , "Int", packagePathType   ; PackagePathType
    , "Ptr", bufferLength   ; DWORD* in/out
    , "Ptr", buffer   ; BYTE* optional, out
    , "Ptr", count   ; DWORD* optional, out
    , "UInt")   ; return: WIN32_ERROR

●GetCurrentPackageInfo2(flags, packagePathType, bufferLength, buffer, count) = DLL("api-ms-win-appmodel-runtime-l1-1-3.dll", "dword GetCurrentPackageInfo2(dword, int, void*, void*, void*)")
# 呼び出し: GetCurrentPackageInfo2(flags, packagePathType, bufferLength, buffer, count)
# flags : DWORD -> "dword"
# packagePathType : PackagePathType -> "int"
# bufferLength : DWORD* in/out -> "void*"
# buffer : BYTE* optional, out -> "void*"
# count : DWORD* optional, out -> "void*"
# 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)。