GetCurrentPackageId

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

WIN32_ERROR GetCurrentPackageId(
    DWORD* bufferLength,
    BYTE* buffer   // optional
);

<DllImport("KERNEL32.dll", ExactSpelling:=True)>
Public Shared Function GetCurrentPackageId(
    ByRef bufferLength As UInteger,   ' DWORD* in/out
    buffer As IntPtr   ' BYTE* optional, out
) As UInteger
End Function

' bufferLength : DWORD* in/out
' buffer : BYTE* optional, out
Declare PtrSafe Function GetCurrentPackageId Lib "kernel32" ( _
    ByRef bufferLength As Long, _
    ByVal buffer 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

GetCurrentPackageId = ctypes.windll.kernel32.GetCurrentPackageId
GetCurrentPackageId.restype = wintypes.DWORD
GetCurrentPackageId.argtypes = [
    ctypes.POINTER(wintypes.DWORD),  # bufferLength : DWORD* in/out
    ctypes.POINTER(ctypes.c_ubyte),  # buffer : BYTE* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetCurrentPackageId = Fiddle::Function.new(
  lib['GetCurrentPackageId'],
  [
    Fiddle::TYPE_VOIDP,  # bufferLength : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # buffer : BYTE* optional, out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn GetCurrentPackageId(
        bufferLength: *mut u32,  // DWORD* in/out
        buffer: *mut u8  // BYTE* optional, out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll")]
public static extern uint GetCurrentPackageId(ref uint bufferLength, IntPtr buffer);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetCurrentPackageId' -Namespace Win32 -PassThru
# $api::GetCurrentPackageId(bufferLength, buffer)

#uselib "KERNEL32.dll"
#func global GetCurrentPackageId "GetCurrentPackageId" sptr, sptr
; GetCurrentPackageId varptr(bufferLength), varptr(buffer)   ; 戻り値は stat
; bufferLength : DWORD* in/out -> "sptr"
; buffer : BYTE* 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 GetCurrentPackageId "GetCurrentPackageId" var, var
; res = GetCurrentPackageId(bufferLength, buffer)
; bufferLength : DWORD* in/out -> "var"
; buffer : BYTE* 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 GetCurrentPackageId(DWORD* bufferLength, BYTE* buffer)
#uselib "KERNEL32.dll"
#cfunc global GetCurrentPackageId "GetCurrentPackageId" var, var
; res = GetCurrentPackageId(bufferLength, buffer)
; bufferLength : DWORD* in/out -> "var"
; buffer : BYTE* 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")
	procGetCurrentPackageId = kernel32.NewProc("GetCurrentPackageId")
)

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

function GetCurrentPackageId(
  bufferLength: Pointer;   // DWORD* in/out
  buffer: Pointer   // BYTE* optional, out
): DWORD; stdcall;
  external 'KERNEL32.dll' name 'GetCurrentPackageId';

result := DllCall("KERNEL32\GetCurrentPackageId"
    , "Ptr", bufferLength   ; DWORD* in/out
    , "Ptr", buffer   ; BYTE* optional, out
    , "UInt")   ; return: WIN32_ERROR

●GetCurrentPackageId(bufferLength, buffer) = DLL("KERNEL32.dll", "dword GetCurrentPackageId(void*, void*)")
# 呼び出し: GetCurrentPackageId(bufferLength, buffer)
# bufferLength : DWORD* in/out -> "void*"
# buffer : BYTE* 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)。