OleMetafilePictFromIconAndLabel

// ole32.dll
#include <windows.h>

HGLOBAL OleMetafilePictFromIconAndLabel(
    HICON hIcon,
    LPWSTR lpszLabel,
    LPWSTR lpszSourceFile,
    DWORD iIconIndex
);

<DllImport("ole32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function OleMetafilePictFromIconAndLabel(
    hIcon As IntPtr,   ' HICON
    <MarshalAs(UnmanagedType.LPWStr)> lpszLabel As String,   ' LPWSTR
    <MarshalAs(UnmanagedType.LPWStr)> lpszSourceFile As String,   ' LPWSTR
    iIconIndex As UInteger   ' DWORD
) As IntPtr
End Function

' hIcon : HICON
' lpszLabel : LPWSTR
' lpszSourceFile : LPWSTR
' iIconIndex : DWORD
Declare PtrSafe Function OleMetafilePictFromIconAndLabel Lib "ole32" ( _
    ByVal hIcon As LongPtr, _
    ByVal lpszLabel As LongPtr, _
    ByVal lpszSourceFile As LongPtr, _
    ByVal iIconIndex As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

OleMetafilePictFromIconAndLabel = ctypes.windll.ole32.OleMetafilePictFromIconAndLabel
OleMetafilePictFromIconAndLabel.restype = ctypes.c_void_p
OleMetafilePictFromIconAndLabel.argtypes = [
    wintypes.HANDLE,  # hIcon : HICON
    wintypes.LPCWSTR,  # lpszLabel : LPWSTR
    wintypes.LPCWSTR,  # lpszSourceFile : LPWSTR
    wintypes.DWORD,  # iIconIndex : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ole32.dll')
OleMetafilePictFromIconAndLabel = Fiddle::Function.new(
  lib['OleMetafilePictFromIconAndLabel'],
  [
    Fiddle::TYPE_VOIDP,  # hIcon : HICON
    Fiddle::TYPE_VOIDP,  # lpszLabel : LPWSTR
    Fiddle::TYPE_VOIDP,  # lpszSourceFile : LPWSTR
    -Fiddle::TYPE_INT,  # iIconIndex : DWORD
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "ole32")]
extern "system" {
    fn OleMetafilePictFromIconAndLabel(
        hIcon: *mut core::ffi::c_void,  // HICON
        lpszLabel: *mut u16,  // LPWSTR
        lpszSourceFile: *mut u16,  // LPWSTR
        iIconIndex: u32  // DWORD
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ole32.dll", SetLastError = true)]
public static extern IntPtr OleMetafilePictFromIconAndLabel(IntPtr hIcon, [MarshalAs(UnmanagedType.LPWStr)] string lpszLabel, [MarshalAs(UnmanagedType.LPWStr)] string lpszSourceFile, uint iIconIndex);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ole32_OleMetafilePictFromIconAndLabel' -Namespace Win32 -PassThru
# $api::OleMetafilePictFromIconAndLabel(hIcon, lpszLabel, lpszSourceFile, iIconIndex)

#uselib "ole32.dll"
#func global OleMetafilePictFromIconAndLabel "OleMetafilePictFromIconAndLabel" sptr, sptr, sptr, sptr
; OleMetafilePictFromIconAndLabel hIcon, lpszLabel, lpszSourceFile, iIconIndex   ; 戻り値は stat
; hIcon : HICON -> "sptr"
; lpszLabel : LPWSTR -> "sptr"
; lpszSourceFile : LPWSTR -> "sptr"
; iIconIndex : DWORD -> "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 "ole32.dll"
#cfunc global OleMetafilePictFromIconAndLabel "OleMetafilePictFromIconAndLabel" sptr, wstr, wstr, int
; res = OleMetafilePictFromIconAndLabel(hIcon, lpszLabel, lpszSourceFile, iIconIndex)
; hIcon : HICON -> "sptr"
; lpszLabel : LPWSTR -> "wstr"
; lpszSourceFile : LPWSTR -> "wstr"
; iIconIndex : DWORD -> "int"

; HGLOBAL OleMetafilePictFromIconAndLabel(HICON hIcon, LPWSTR lpszLabel, LPWSTR lpszSourceFile, DWORD iIconIndex)
#uselib "ole32.dll"
#cfunc global OleMetafilePictFromIconAndLabel "OleMetafilePictFromIconAndLabel" intptr, wstr, wstr, int
; res = OleMetafilePictFromIconAndLabel(hIcon, lpszLabel, lpszSourceFile, iIconIndex)
; hIcon : HICON -> "intptr"
; lpszLabel : LPWSTR -> "wstr"
; lpszSourceFile : LPWSTR -> "wstr"
; iIconIndex : DWORD -> "int"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	ole32 = windows.NewLazySystemDLL("ole32.dll")
	procOleMetafilePictFromIconAndLabel = ole32.NewProc("OleMetafilePictFromIconAndLabel")
)

// hIcon (HICON), lpszLabel (LPWSTR), lpszSourceFile (LPWSTR), iIconIndex (DWORD)
r1, _, err := procOleMetafilePictFromIconAndLabel.Call(
	uintptr(hIcon),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpszLabel))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpszSourceFile))),
	uintptr(iIconIndex),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HGLOBAL

function OleMetafilePictFromIconAndLabel(
  hIcon: THandle;   // HICON
  lpszLabel: PWideChar;   // LPWSTR
  lpszSourceFile: PWideChar;   // LPWSTR
  iIconIndex: DWORD   // DWORD
): THandle; stdcall;
  external 'ole32.dll' name 'OleMetafilePictFromIconAndLabel';

result := DllCall("ole32\OleMetafilePictFromIconAndLabel"
    , "Ptr", hIcon   ; HICON
    , "WStr", lpszLabel   ; LPWSTR
    , "WStr", lpszSourceFile   ; LPWSTR
    , "UInt", iIconIndex   ; DWORD
    , "Ptr")   ; return: HGLOBAL

●OleMetafilePictFromIconAndLabel(hIcon, lpszLabel, lpszSourceFile, iIconIndex) = DLL("ole32.dll", "void* OleMetafilePictFromIconAndLabel(void*, char*, char*, dword)")
# 呼び出し: OleMetafilePictFromIconAndLabel(hIcon, lpszLabel, lpszSourceFile, iIconIndex)
# hIcon : HICON -> "void*"
# lpszLabel : LPWSTR -> "char*"
# lpszSourceFile : LPWSTR -> "char*"
# iIconIndex : DWORD -> "dword"
# 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)。