SHGetPathFromIDListW

// SHELL32.dll  (Unicode / -W)
#include <windows.h>

BOOL SHGetPathFromIDListW(
    ITEMIDLIST* pidl,
    LPWSTR pszPath
);

<DllImport("SHELL32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function SHGetPathFromIDListW(
    pidl As IntPtr,   ' ITEMIDLIST*
    <MarshalAs(UnmanagedType.LPWStr)> pszPath As System.Text.StringBuilder   ' LPWSTR out
) As Boolean
End Function

' pidl : ITEMIDLIST*
' pszPath : LPWSTR out
Declare PtrSafe Function SHGetPathFromIDListW Lib "shell32" ( _
    ByVal pidl As LongPtr, _
    ByVal pszPath As LongPtr) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SHGetPathFromIDListW = ctypes.windll.shell32.SHGetPathFromIDListW
SHGetPathFromIDListW.restype = wintypes.BOOL
SHGetPathFromIDListW.argtypes = [
    ctypes.c_void_p,  # pidl : ITEMIDLIST*
    wintypes.LPWSTR,  # pszPath : LPWSTR out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHELL32.dll')
SHGetPathFromIDListW = Fiddle::Function.new(
  lib['SHGetPathFromIDListW'],
  [
    Fiddle::TYPE_VOIDP,  # pidl : ITEMIDLIST*
    Fiddle::TYPE_VOIDP,  # pszPath : LPWSTR out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "shell32")]
extern "system" {
    fn SHGetPathFromIDListW(
        pidl: *mut ITEMIDLIST,  // ITEMIDLIST*
        pszPath: *mut u16  // LPWSTR out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("SHELL32.dll", CharSet = CharSet.Unicode)]
public static extern bool SHGetPathFromIDListW(IntPtr pidl, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszPath);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHELL32_SHGetPathFromIDListW' -Namespace Win32 -PassThru
# $api::SHGetPathFromIDListW(pidl, pszPath)

#uselib "SHELL32.dll"
#func global SHGetPathFromIDListW "SHGetPathFromIDListW" wptr, wptr
; SHGetPathFromIDListW varptr(pidl), varptr(pszPath)   ; 戻り値は stat
; pidl : ITEMIDLIST* -> "wptr"
; pszPath : LPWSTR out -> "wptr"
; ※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 "SHELL32.dll"
#cfunc global SHGetPathFromIDListW "SHGetPathFromIDListW" var, var
; res = SHGetPathFromIDListW(pidl, pszPath)
; pidl : ITEMIDLIST* -> "var"
; pszPath : LPWSTR 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。

; BOOL SHGetPathFromIDListW(ITEMIDLIST* pidl, LPWSTR pszPath)
#uselib "SHELL32.dll"
#cfunc global SHGetPathFromIDListW "SHGetPathFromIDListW" var, var
; res = SHGetPathFromIDListW(pidl, pszPath)
; pidl : ITEMIDLIST* -> "var"
; pszPath : LPWSTR 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 (
	shell32 = windows.NewLazySystemDLL("SHELL32.dll")
	procSHGetPathFromIDListW = shell32.NewProc("SHGetPathFromIDListW")
)

// pidl (ITEMIDLIST*), pszPath (LPWSTR out)
r1, _, err := procSHGetPathFromIDListW.Call(
	uintptr(pidl),
	uintptr(pszPath),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SHGetPathFromIDListW(
  pidl: Pointer;   // ITEMIDLIST*
  pszPath: PWideChar   // LPWSTR out
): BOOL; stdcall;
  external 'SHELL32.dll' name 'SHGetPathFromIDListW';

result := DllCall("SHELL32\SHGetPathFromIDListW"
    , "Ptr", pidl   ; ITEMIDLIST*
    , "Ptr", pszPath   ; LPWSTR out
    , "Int")   ; return: BOOL

●SHGetPathFromIDListW(pidl, pszPath) = DLL("SHELL32.dll", "bool SHGetPathFromIDListW(void*, char*)")
# 呼び出し: SHGetPathFromIDListW(pidl, pszPath)
# pidl : ITEMIDLIST* -> "void*"
# pszPath : LPWSTR 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。