GdipConvertToEmfPlusToFile

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

Status GdipConvertToEmfPlusToFile(
    const GpGraphics* refGraphics,
    GpMetafile* metafile,
    INT* conversionFailureFlag,
    LPCWSTR filename,
    EmfType emfType,
    LPCWSTR description,
    GpMetafile** out_metafile
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipConvertToEmfPlusToFile(
    refGraphics As IntPtr,   ' GpGraphics*
    metafile As IntPtr,   ' GpMetafile* in/out
    ByRef conversionFailureFlag As Integer,   ' INT* in/out
    <MarshalAs(UnmanagedType.LPWStr)> filename As String,   ' LPCWSTR
    emfType As Integer,   ' EmfType
    <MarshalAs(UnmanagedType.LPWStr)> description As String,   ' LPCWSTR
    out_metafile As IntPtr   ' GpMetafile** in/out
) As Integer
End Function

' refGraphics : GpGraphics*
' metafile : GpMetafile* in/out
' conversionFailureFlag : INT* in/out
' filename : LPCWSTR
' emfType : EmfType
' description : LPCWSTR
' out_metafile : GpMetafile** in/out
Declare PtrSafe Function GdipConvertToEmfPlusToFile Lib "gdiplus" ( _
    ByVal refGraphics As LongPtr, _
    ByVal metafile As LongPtr, _
    ByRef conversionFailureFlag As Long, _
    ByVal filename As LongPtr, _
    ByVal emfType As Long, _
    ByVal description As LongPtr, _
    ByVal out_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

GdipConvertToEmfPlusToFile = ctypes.windll.gdiplus.GdipConvertToEmfPlusToFile
GdipConvertToEmfPlusToFile.restype = ctypes.c_int
GdipConvertToEmfPlusToFile.argtypes = [
    ctypes.c_void_p,  # refGraphics : GpGraphics*
    ctypes.c_void_p,  # metafile : GpMetafile* in/out
    ctypes.POINTER(ctypes.c_int),  # conversionFailureFlag : INT* in/out
    wintypes.LPCWSTR,  # filename : LPCWSTR
    ctypes.c_int,  # emfType : EmfType
    wintypes.LPCWSTR,  # description : LPCWSTR
    ctypes.c_void_p,  # out_metafile : GpMetafile** in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipConvertToEmfPlusToFile = Fiddle::Function.new(
  lib['GdipConvertToEmfPlusToFile'],
  [
    Fiddle::TYPE_VOIDP,  # refGraphics : GpGraphics*
    Fiddle::TYPE_VOIDP,  # metafile : GpMetafile* in/out
    Fiddle::TYPE_VOIDP,  # conversionFailureFlag : INT* in/out
    Fiddle::TYPE_VOIDP,  # filename : LPCWSTR
    Fiddle::TYPE_INT,  # emfType : EmfType
    Fiddle::TYPE_VOIDP,  # description : LPCWSTR
    Fiddle::TYPE_VOIDP,  # out_metafile : GpMetafile** in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipConvertToEmfPlusToFile(
        refGraphics: *const GpGraphics,  // GpGraphics*
        metafile: *mut GpMetafile,  // GpMetafile* in/out
        conversionFailureFlag: *mut i32,  // INT* in/out
        filename: *const u16,  // LPCWSTR
        emfType: i32,  // EmfType
        description: *const u16,  // LPCWSTR
        out_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 GdipConvertToEmfPlusToFile(IntPtr refGraphics, IntPtr metafile, ref int conversionFailureFlag, [MarshalAs(UnmanagedType.LPWStr)] string filename, int emfType, [MarshalAs(UnmanagedType.LPWStr)] string description, IntPtr out_metafile);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipConvertToEmfPlusToFile' -Namespace Win32 -PassThru
# $api::GdipConvertToEmfPlusToFile(refGraphics, metafile, conversionFailureFlag, filename, emfType, description, out_metafile)

#uselib "gdiplus.dll"
#func global GdipConvertToEmfPlusToFile "GdipConvertToEmfPlusToFile" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; GdipConvertToEmfPlusToFile varptr(refGraphics), varptr(metafile), varptr(conversionFailureFlag), filename, emfType, description, varptr(out_metafile)   ; 戻り値は stat
; refGraphics : GpGraphics* -> "sptr"
; metafile : GpMetafile* in/out -> "sptr"
; conversionFailureFlag : INT* in/out -> "sptr"
; filename : LPCWSTR -> "sptr"
; emfType : EmfType -> "sptr"
; description : LPCWSTR -> "sptr"
; out_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 GdipConvertToEmfPlusToFile "GdipConvertToEmfPlusToFile" var, var, var, wstr, int, wstr, var
; res = GdipConvertToEmfPlusToFile(refGraphics, metafile, conversionFailureFlag, filename, emfType, description, out_metafile)
; refGraphics : GpGraphics* -> "var"
; metafile : GpMetafile* in/out -> "var"
; conversionFailureFlag : INT* in/out -> "var"
; filename : LPCWSTR -> "wstr"
; emfType : EmfType -> "int"
; description : LPCWSTR -> "wstr"
; out_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 GdipConvertToEmfPlusToFile(GpGraphics* refGraphics, GpMetafile* metafile, INT* conversionFailureFlag, LPCWSTR filename, EmfType emfType, LPCWSTR description, GpMetafile** out_metafile)
#uselib "gdiplus.dll"
#cfunc global GdipConvertToEmfPlusToFile "GdipConvertToEmfPlusToFile" var, var, var, wstr, int, wstr, var
; res = GdipConvertToEmfPlusToFile(refGraphics, metafile, conversionFailureFlag, filename, emfType, description, out_metafile)
; refGraphics : GpGraphics* -> "var"
; metafile : GpMetafile* in/out -> "var"
; conversionFailureFlag : INT* in/out -> "var"
; filename : LPCWSTR -> "wstr"
; emfType : EmfType -> "int"
; description : LPCWSTR -> "wstr"
; out_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")
	procGdipConvertToEmfPlusToFile = gdiplus.NewProc("GdipConvertToEmfPlusToFile")
)

// refGraphics (GpGraphics*), metafile (GpMetafile* in/out), conversionFailureFlag (INT* in/out), filename (LPCWSTR), emfType (EmfType), description (LPCWSTR), out_metafile (GpMetafile** in/out)
r1, _, err := procGdipConvertToEmfPlusToFile.Call(
	uintptr(refGraphics),
	uintptr(metafile),
	uintptr(conversionFailureFlag),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(filename))),
	uintptr(emfType),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(description))),
	uintptr(out_metafile),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipConvertToEmfPlusToFile(
  refGraphics: Pointer;   // GpGraphics*
  metafile: Pointer;   // GpMetafile* in/out
  conversionFailureFlag: Pointer;   // INT* in/out
  filename: PWideChar;   // LPCWSTR
  emfType: Integer;   // EmfType
  description: PWideChar;   // LPCWSTR
  out_metafile: Pointer   // GpMetafile** in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipConvertToEmfPlusToFile';

result := DllCall("gdiplus\GdipConvertToEmfPlusToFile"
    , "Ptr", refGraphics   ; GpGraphics*
    , "Ptr", metafile   ; GpMetafile* in/out
    , "Ptr", conversionFailureFlag   ; INT* in/out
    , "WStr", filename   ; LPCWSTR
    , "Int", emfType   ; EmfType
    , "WStr", description   ; LPCWSTR
    , "Ptr", out_metafile   ; GpMetafile** in/out
    , "Int")   ; return: Status

●GdipConvertToEmfPlusToFile(refGraphics, metafile, conversionFailureFlag, filename, emfType, description, out_metafile) = DLL("gdiplus.dll", "int GdipConvertToEmfPlusToFile(void*, void*, void*, char*, int, char*, void*)")
# 呼び出し: GdipConvertToEmfPlusToFile(refGraphics, metafile, conversionFailureFlag, filename, emfType, description, out_metafile)
# refGraphics : GpGraphics* -> "void*"
# metafile : GpMetafile* in/out -> "void*"
# conversionFailureFlag : INT* in/out -> "void*"
# filename : LPCWSTR -> "char*"
# emfType : EmfType -> "int"
# description : LPCWSTR -> "char*"
# out_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)。