EnumEnhMetaFile

// GDI32.dll
#include <windows.h>

BOOL EnumEnhMetaFile(
    HDC hdc,   // optional
    HENHMETAFILE hmf,
    ENHMFENUMPROC proc,
    void* param3,   // optional
    const RECT* lpRect   // optional
);

<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function EnumEnhMetaFile(
    hdc As IntPtr,   ' HDC optional
    hmf As IntPtr,   ' HENHMETAFILE
    proc As IntPtr,   ' ENHMFENUMPROC
    param3 As IntPtr,   ' void* optional
    lpRect As IntPtr   ' RECT* optional
) As Boolean
End Function

' hdc : HDC optional
' hmf : HENHMETAFILE
' proc : ENHMFENUMPROC
' param3 : void* optional
' lpRect : RECT* optional
Declare PtrSafe Function EnumEnhMetaFile Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal hmf As LongPtr, _
    ByVal proc As LongPtr, _
    ByVal param3 As LongPtr, _
    ByVal lpRect 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

EnumEnhMetaFile = ctypes.windll.gdi32.EnumEnhMetaFile
EnumEnhMetaFile.restype = wintypes.BOOL
EnumEnhMetaFile.argtypes = [
    wintypes.HANDLE,  # hdc : HDC optional
    wintypes.HANDLE,  # hmf : HENHMETAFILE
    ctypes.c_void_p,  # proc : ENHMFENUMPROC
    ctypes.POINTER(None),  # param3 : void* optional
    ctypes.c_void_p,  # lpRect : RECT* optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
EnumEnhMetaFile = Fiddle::Function.new(
  lib['EnumEnhMetaFile'],
  [
    Fiddle::TYPE_VOIDP,  # hdc : HDC optional
    Fiddle::TYPE_VOIDP,  # hmf : HENHMETAFILE
    Fiddle::TYPE_VOIDP,  # proc : ENHMFENUMPROC
    Fiddle::TYPE_VOIDP,  # param3 : void* optional
    Fiddle::TYPE_VOIDP,  # lpRect : RECT* optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdi32")]
extern "system" {
    fn EnumEnhMetaFile(
        hdc: *mut core::ffi::c_void,  // HDC optional
        hmf: *mut core::ffi::c_void,  // HENHMETAFILE
        proc: *const core::ffi::c_void,  // ENHMFENUMPROC
        param3: *mut (),  // void* optional
        lpRect: *const RECT  // RECT* optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("GDI32.dll")]
public static extern bool EnumEnhMetaFile(IntPtr hdc, IntPtr hmf, IntPtr proc, IntPtr param3, IntPtr lpRect);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_EnumEnhMetaFile' -Namespace Win32 -PassThru
# $api::EnumEnhMetaFile(hdc, hmf, proc, param3, lpRect)

#uselib "GDI32.dll"
#func global EnumEnhMetaFile "EnumEnhMetaFile" sptr, sptr, sptr, sptr, sptr
; EnumEnhMetaFile hdc, hmf, proc, param3, varptr(lpRect)   ; 戻り値は stat
; hdc : HDC optional -> "sptr"
; hmf : HENHMETAFILE -> "sptr"
; proc : ENHMFENUMPROC -> "sptr"
; param3 : void* optional -> "sptr"
; lpRect : RECT* optional -> "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 "GDI32.dll"
#cfunc global EnumEnhMetaFile "EnumEnhMetaFile" sptr, sptr, sptr, sptr, var
; res = EnumEnhMetaFile(hdc, hmf, proc, param3, lpRect)
; hdc : HDC optional -> "sptr"
; hmf : HENHMETAFILE -> "sptr"
; proc : ENHMFENUMPROC -> "sptr"
; param3 : void* optional -> "sptr"
; lpRect : RECT* optional -> "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 EnumEnhMetaFile(HDC hdc, HENHMETAFILE hmf, ENHMFENUMPROC proc, void* param3, RECT* lpRect)
#uselib "GDI32.dll"
#cfunc global EnumEnhMetaFile "EnumEnhMetaFile" intptr, intptr, intptr, intptr, var
; res = EnumEnhMetaFile(hdc, hmf, proc, param3, lpRect)
; hdc : HDC optional -> "intptr"
; hmf : HENHMETAFILE -> "intptr"
; proc : ENHMFENUMPROC -> "intptr"
; param3 : void* optional -> "intptr"
; lpRect : RECT* optional -> "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 (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procEnumEnhMetaFile = gdi32.NewProc("EnumEnhMetaFile")
)

// hdc (HDC optional), hmf (HENHMETAFILE), proc (ENHMFENUMPROC), param3 (void* optional), lpRect (RECT* optional)
r1, _, err := procEnumEnhMetaFile.Call(
	uintptr(hdc),
	uintptr(hmf),
	uintptr(proc),
	uintptr(param3),
	uintptr(lpRect),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function EnumEnhMetaFile(
  hdc: THandle;   // HDC optional
  hmf: THandle;   // HENHMETAFILE
  proc: Pointer;   // ENHMFENUMPROC
  param3: Pointer;   // void* optional
  lpRect: Pointer   // RECT* optional
): BOOL; stdcall;
  external 'GDI32.dll' name 'EnumEnhMetaFile';

result := DllCall("GDI32\EnumEnhMetaFile"
    , "Ptr", hdc   ; HDC optional
    , "Ptr", hmf   ; HENHMETAFILE
    , "Ptr", proc   ; ENHMFENUMPROC
    , "Ptr", param3   ; void* optional
    , "Ptr", lpRect   ; RECT* optional
    , "Int")   ; return: BOOL

●EnumEnhMetaFile(hdc, hmf, proc, param3, lpRect) = DLL("GDI32.dll", "bool EnumEnhMetaFile(void*, void*, void*, void*, void*)")
# 呼び出し: EnumEnhMetaFile(hdc, hmf, proc, param3, lpRect)
# hdc : HDC optional -> "void*"
# hmf : HENHMETAFILE -> "void*"
# proc : ENHMFENUMPROC -> "void*"
# param3 : void* optional -> "void*"
# lpRect : RECT* optional -> "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)。