SetupDiLoadClassIcon

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

BOOL SetupDiLoadClassIcon(
    const GUID* ClassGuid,
    HICON* LargeIcon,   // optional
    INT* MiniIconIndex   // optional
);

<DllImport("SETUPAPI.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetupDiLoadClassIcon(
    ByRef ClassGuid As Guid,   ' GUID*
    LargeIcon As IntPtr,   ' HICON* optional, out
    MiniIconIndex As IntPtr   ' INT* optional, out
) As Boolean
End Function

' ClassGuid : GUID*
' LargeIcon : HICON* optional, out
' MiniIconIndex : INT* optional, out
Declare PtrSafe Function SetupDiLoadClassIcon Lib "setupapi" ( _
    ByVal ClassGuid As LongPtr, _
    ByVal LargeIcon As LongPtr, _
    ByVal MiniIconIndex 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

SetupDiLoadClassIcon = ctypes.windll.setupapi.SetupDiLoadClassIcon
SetupDiLoadClassIcon.restype = wintypes.BOOL
SetupDiLoadClassIcon.argtypes = [
    ctypes.c_void_p,  # ClassGuid : GUID*
    ctypes.c_void_p,  # LargeIcon : HICON* optional, out
    ctypes.POINTER(ctypes.c_int),  # MiniIconIndex : INT* optional, out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SETUPAPI.dll')
SetupDiLoadClassIcon = Fiddle::Function.new(
  lib['SetupDiLoadClassIcon'],
  [
    Fiddle::TYPE_VOIDP,  # ClassGuid : GUID*
    Fiddle::TYPE_VOIDP,  # LargeIcon : HICON* optional, out
    Fiddle::TYPE_VOIDP,  # MiniIconIndex : INT* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "setupapi")]
extern "system" {
    fn SetupDiLoadClassIcon(
        ClassGuid: *const GUID,  // GUID*
        LargeIcon: *mut *mut core::ffi::c_void,  // HICON* optional, out
        MiniIconIndex: *mut i32  // INT* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("SETUPAPI.dll", SetLastError = true)]
public static extern bool SetupDiLoadClassIcon(ref Guid ClassGuid, IntPtr LargeIcon, IntPtr MiniIconIndex);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SETUPAPI_SetupDiLoadClassIcon' -Namespace Win32 -PassThru
# $api::SetupDiLoadClassIcon(ClassGuid, LargeIcon, MiniIconIndex)

#uselib "SETUPAPI.dll"
#func global SetupDiLoadClassIcon "SetupDiLoadClassIcon" sptr, sptr, sptr
; SetupDiLoadClassIcon varptr(ClassGuid), LargeIcon, varptr(MiniIconIndex)   ; 戻り値は stat
; ClassGuid : GUID* -> "sptr"
; LargeIcon : HICON* optional, out -> "sptr"
; MiniIconIndex : 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 "SETUPAPI.dll"
#cfunc global SetupDiLoadClassIcon "SetupDiLoadClassIcon" var, sptr, var
; res = SetupDiLoadClassIcon(ClassGuid, LargeIcon, MiniIconIndex)
; ClassGuid : GUID* -> "var"
; LargeIcon : HICON* optional, out -> "sptr"
; MiniIconIndex : 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。

; BOOL SetupDiLoadClassIcon(GUID* ClassGuid, HICON* LargeIcon, INT* MiniIconIndex)
#uselib "SETUPAPI.dll"
#cfunc global SetupDiLoadClassIcon "SetupDiLoadClassIcon" var, intptr, var
; res = SetupDiLoadClassIcon(ClassGuid, LargeIcon, MiniIconIndex)
; ClassGuid : GUID* -> "var"
; LargeIcon : HICON* optional, out -> "intptr"
; MiniIconIndex : 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 (
	setupapi = windows.NewLazySystemDLL("SETUPAPI.dll")
	procSetupDiLoadClassIcon = setupapi.NewProc("SetupDiLoadClassIcon")
)

// ClassGuid (GUID*), LargeIcon (HICON* optional, out), MiniIconIndex (INT* optional, out)
r1, _, err := procSetupDiLoadClassIcon.Call(
	uintptr(ClassGuid),
	uintptr(LargeIcon),
	uintptr(MiniIconIndex),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SetupDiLoadClassIcon(
  ClassGuid: PGUID;   // GUID*
  LargeIcon: Pointer;   // HICON* optional, out
  MiniIconIndex: Pointer   // INT* optional, out
): BOOL; stdcall;
  external 'SETUPAPI.dll' name 'SetupDiLoadClassIcon';

result := DllCall("SETUPAPI\SetupDiLoadClassIcon"
    , "Ptr", ClassGuid   ; GUID*
    , "Ptr", LargeIcon   ; HICON* optional, out
    , "Ptr", MiniIconIndex   ; INT* optional, out
    , "Int")   ; return: BOOL

●SetupDiLoadClassIcon(ClassGuid, LargeIcon, MiniIconIndex) = DLL("SETUPAPI.dll", "bool SetupDiLoadClassIcon(void*, void*, void*)")
# 呼び出し: SetupDiLoadClassIcon(ClassGuid, LargeIcon, MiniIconIndex)
# ClassGuid : GUID* -> "void*"
# LargeIcon : HICON* optional, out -> "void*"
# MiniIconIndex : 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)。