GdipCreateMetafileFromWmfFile

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

Status GdipCreateMetafileFromWmfFile(
    LPCWSTR file,
    const WmfPlaceableFileHeader* wmfPlaceableFileHeader,
    GpMetafile** metafile
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipCreateMetafileFromWmfFile(
    <MarshalAs(UnmanagedType.LPWStr)> file As String,   ' LPCWSTR
    wmfPlaceableFileHeader As IntPtr,   ' WmfPlaceableFileHeader*
    metafile As IntPtr   ' GpMetafile** in/out
) As Integer
End Function

' file : LPCWSTR
' wmfPlaceableFileHeader : WmfPlaceableFileHeader*
' metafile : GpMetafile** in/out
Declare PtrSafe Function GdipCreateMetafileFromWmfFile Lib "gdiplus" ( _
    ByVal file As LongPtr, _
    ByVal wmfPlaceableFileHeader As LongPtr, _
    ByVal metafile 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

GdipCreateMetafileFromWmfFile = ctypes.windll.gdiplus.GdipCreateMetafileFromWmfFile
GdipCreateMetafileFromWmfFile.restype = ctypes.c_int
GdipCreateMetafileFromWmfFile.argtypes = [
    wintypes.LPCWSTR,  # file : LPCWSTR
    ctypes.c_void_p,  # wmfPlaceableFileHeader : WmfPlaceableFileHeader*
    ctypes.c_void_p,  # metafile : GpMetafile** in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipCreateMetafileFromWmfFile = Fiddle::Function.new(
  lib['GdipCreateMetafileFromWmfFile'],
  [
    Fiddle::TYPE_VOIDP,  # file : LPCWSTR
    Fiddle::TYPE_VOIDP,  # wmfPlaceableFileHeader : WmfPlaceableFileHeader*
    Fiddle::TYPE_VOIDP,  # metafile : GpMetafile** in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipCreateMetafileFromWmfFile(
        file: *const u16,  // LPCWSTR
        wmfPlaceableFileHeader: *const WmfPlaceableFileHeader,  // WmfPlaceableFileHeader*
        metafile: *mut *mut GpMetafile  // GpMetafile** in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("gdiplus.dll")]
public static extern int GdipCreateMetafileFromWmfFile([MarshalAs(UnmanagedType.LPWStr)] string file, IntPtr wmfPlaceableFileHeader, IntPtr metafile);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipCreateMetafileFromWmfFile' -Namespace Win32 -PassThru
# $api::GdipCreateMetafileFromWmfFile(file, wmfPlaceableFileHeader, metafile)

#uselib "gdiplus.dll"
#func global GdipCreateMetafileFromWmfFile "GdipCreateMetafileFromWmfFile" sptr, sptr, sptr
; GdipCreateMetafileFromWmfFile file, varptr(wmfPlaceableFileHeader), varptr(metafile)   ; 戻り値は stat
; file : LPCWSTR -> "sptr"
; wmfPlaceableFileHeader : WmfPlaceableFileHeader* -> "sptr"
; metafile : GpMetafile** in/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 "gdiplus.dll"
#cfunc global GdipCreateMetafileFromWmfFile "GdipCreateMetafileFromWmfFile" wstr, var, var
; res = GdipCreateMetafileFromWmfFile(file, wmfPlaceableFileHeader, metafile)
; file : LPCWSTR -> "wstr"
; wmfPlaceableFileHeader : WmfPlaceableFileHeader* -> "var"
; metafile : GpMetafile** in/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。

; Status GdipCreateMetafileFromWmfFile(LPCWSTR file, WmfPlaceableFileHeader* wmfPlaceableFileHeader, GpMetafile** metafile)
#uselib "gdiplus.dll"
#cfunc global GdipCreateMetafileFromWmfFile "GdipCreateMetafileFromWmfFile" wstr, var, var
; res = GdipCreateMetafileFromWmfFile(file, wmfPlaceableFileHeader, metafile)
; file : LPCWSTR -> "wstr"
; wmfPlaceableFileHeader : WmfPlaceableFileHeader* -> "var"
; metafile : GpMetafile** in/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 (
	gdiplus = windows.NewLazySystemDLL("gdiplus.dll")
	procGdipCreateMetafileFromWmfFile = gdiplus.NewProc("GdipCreateMetafileFromWmfFile")
)

// file (LPCWSTR), wmfPlaceableFileHeader (WmfPlaceableFileHeader*), metafile (GpMetafile** in/out)
r1, _, err := procGdipCreateMetafileFromWmfFile.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(file))),
	uintptr(wmfPlaceableFileHeader),
	uintptr(metafile),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipCreateMetafileFromWmfFile(
  file: PWideChar;   // LPCWSTR
  wmfPlaceableFileHeader: Pointer;   // WmfPlaceableFileHeader*
  metafile: Pointer   // GpMetafile** in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipCreateMetafileFromWmfFile';

result := DllCall("gdiplus\GdipCreateMetafileFromWmfFile"
    , "WStr", file   ; LPCWSTR
    , "Ptr", wmfPlaceableFileHeader   ; WmfPlaceableFileHeader*
    , "Ptr", metafile   ; GpMetafile** in/out
    , "Int")   ; return: Status

●GdipCreateMetafileFromWmfFile(file, wmfPlaceableFileHeader, metafile) = DLL("gdiplus.dll", "int GdipCreateMetafileFromWmfFile(char*, void*, void*)")
# 呼び出し: GdipCreateMetafileFromWmfFile(file, wmfPlaceableFileHeader, metafile)
# file : LPCWSTR -> "char*"
# wmfPlaceableFileHeader : WmfPlaceableFileHeader* -> "void*"
# metafile : GpMetafile** in/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)。