SHMapPIDLToSystemImageListIndex

// SHELL32.dll
#include <windows.h>

INT SHMapPIDLToSystemImageListIndex(
    IShellFolder* pshf,
    ITEMIDLIST* pidl,
    INT* piIndexSel   // optional
);

<DllImport("SHELL32.dll", ExactSpelling:=True)>
Public Shared Function SHMapPIDLToSystemImageListIndex(
    pshf As IntPtr,   ' IShellFolder*
    pidl As IntPtr,   ' ITEMIDLIST*
    piIndexSel As IntPtr   ' INT* optional, out
) As Integer
End Function

' pshf : IShellFolder*
' pidl : ITEMIDLIST*
' piIndexSel : INT* optional, out
Declare PtrSafe Function SHMapPIDLToSystemImageListIndex Lib "shell32" ( _
    ByVal pshf As LongPtr, _
    ByVal pidl As LongPtr, _
    ByVal piIndexSel 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

SHMapPIDLToSystemImageListIndex = ctypes.windll.shell32.SHMapPIDLToSystemImageListIndex
SHMapPIDLToSystemImageListIndex.restype = ctypes.c_int
SHMapPIDLToSystemImageListIndex.argtypes = [
    ctypes.c_void_p,  # pshf : IShellFolder*
    ctypes.c_void_p,  # pidl : ITEMIDLIST*
    ctypes.POINTER(ctypes.c_int),  # piIndexSel : INT* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHELL32.dll')
SHMapPIDLToSystemImageListIndex = Fiddle::Function.new(
  lib['SHMapPIDLToSystemImageListIndex'],
  [
    Fiddle::TYPE_VOIDP,  # pshf : IShellFolder*
    Fiddle::TYPE_VOIDP,  # pidl : ITEMIDLIST*
    Fiddle::TYPE_VOIDP,  # piIndexSel : INT* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "shell32")]
extern "system" {
    fn SHMapPIDLToSystemImageListIndex(
        pshf: *mut core::ffi::c_void,  // IShellFolder*
        pidl: *mut ITEMIDLIST,  // ITEMIDLIST*
        piIndexSel: *mut i32  // INT* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHELL32.dll")]
public static extern int SHMapPIDLToSystemImageListIndex(IntPtr pshf, IntPtr pidl, IntPtr piIndexSel);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHELL32_SHMapPIDLToSystemImageListIndex' -Namespace Win32 -PassThru
# $api::SHMapPIDLToSystemImageListIndex(pshf, pidl, piIndexSel)

#uselib "SHELL32.dll"
#func global SHMapPIDLToSystemImageListIndex "SHMapPIDLToSystemImageListIndex" sptr, sptr, sptr
; SHMapPIDLToSystemImageListIndex pshf, varptr(pidl), varptr(piIndexSel)   ; 戻り値は stat
; pshf : IShellFolder* -> "sptr"
; pidl : ITEMIDLIST* -> "sptr"
; piIndexSel : INT* 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 "SHELL32.dll"
#cfunc global SHMapPIDLToSystemImageListIndex "SHMapPIDLToSystemImageListIndex" sptr, var, var
; res = SHMapPIDLToSystemImageListIndex(pshf, pidl, piIndexSel)
; pshf : IShellFolder* -> "sptr"
; pidl : ITEMIDLIST* -> "var"
; piIndexSel : INT* 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。

; INT SHMapPIDLToSystemImageListIndex(IShellFolder* pshf, ITEMIDLIST* pidl, INT* piIndexSel)
#uselib "SHELL32.dll"
#cfunc global SHMapPIDLToSystemImageListIndex "SHMapPIDLToSystemImageListIndex" intptr, var, var
; res = SHMapPIDLToSystemImageListIndex(pshf, pidl, piIndexSel)
; pshf : IShellFolder* -> "intptr"
; pidl : ITEMIDLIST* -> "var"
; piIndexSel : INT* 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 (
	shell32 = windows.NewLazySystemDLL("SHELL32.dll")
	procSHMapPIDLToSystemImageListIndex = shell32.NewProc("SHMapPIDLToSystemImageListIndex")
)

// pshf (IShellFolder*), pidl (ITEMIDLIST*), piIndexSel (INT* optional, out)
r1, _, err := procSHMapPIDLToSystemImageListIndex.Call(
	uintptr(pshf),
	uintptr(pidl),
	uintptr(piIndexSel),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function SHMapPIDLToSystemImageListIndex(
  pshf: Pointer;   // IShellFolder*
  pidl: Pointer;   // ITEMIDLIST*
  piIndexSel: Pointer   // INT* optional, out
): Integer; stdcall;
  external 'SHELL32.dll' name 'SHMapPIDLToSystemImageListIndex';

result := DllCall("SHELL32\SHMapPIDLToSystemImageListIndex"
    , "Ptr", pshf   ; IShellFolder*
    , "Ptr", pidl   ; ITEMIDLIST*
    , "Ptr", piIndexSel   ; INT* optional, out
    , "Int")   ; return: INT

●SHMapPIDLToSystemImageListIndex(pshf, pidl, piIndexSel) = DLL("SHELL32.dll", "int SHMapPIDLToSystemImageListIndex(void*, void*, void*)")
# 呼び出し: SHMapPIDLToSystemImageListIndex(pshf, pidl, piIndexSel)
# pshf : IShellFolder* -> "void*"
# pidl : ITEMIDLIST* -> "void*"
# piIndexSel : INT* 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)。