GdipPrivateAddFontFile

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

Status GdipPrivateAddFontFile(
    GpFontCollection* fontCollection,
    LPCWSTR filename
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipPrivateAddFontFile(
    fontCollection As IntPtr,   ' GpFontCollection* in/out
    <MarshalAs(UnmanagedType.LPWStr)> filename As String   ' LPCWSTR
) As Integer
End Function

' fontCollection : GpFontCollection* in/out
' filename : LPCWSTR
Declare PtrSafe Function GdipPrivateAddFontFile Lib "gdiplus" ( _
    ByVal fontCollection As LongPtr, _
    ByVal filename 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

GdipPrivateAddFontFile = ctypes.windll.gdiplus.GdipPrivateAddFontFile
GdipPrivateAddFontFile.restype = ctypes.c_int
GdipPrivateAddFontFile.argtypes = [
    ctypes.c_void_p,  # fontCollection : GpFontCollection* in/out
    wintypes.LPCWSTR,  # filename : LPCWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipPrivateAddFontFile = Fiddle::Function.new(
  lib['GdipPrivateAddFontFile'],
  [
    Fiddle::TYPE_VOIDP,  # fontCollection : GpFontCollection* in/out
    Fiddle::TYPE_VOIDP,  # filename : LPCWSTR
  ],
  Fiddle::TYPE_INT)

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

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

#uselib "gdiplus.dll"
#func global GdipPrivateAddFontFile "GdipPrivateAddFontFile" sptr, sptr
; GdipPrivateAddFontFile varptr(fontCollection), filename   ; 戻り値は stat
; fontCollection : GpFontCollection* in/out -> "sptr"
; filename : LPCWSTR -> "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 GdipPrivateAddFontFile "GdipPrivateAddFontFile" var, wstr
; res = GdipPrivateAddFontFile(fontCollection, filename)
; fontCollection : GpFontCollection* in/out -> "var"
; filename : LPCWSTR -> "wstr"
; ※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 GdipPrivateAddFontFile(GpFontCollection* fontCollection, LPCWSTR filename)
#uselib "gdiplus.dll"
#cfunc global GdipPrivateAddFontFile "GdipPrivateAddFontFile" var, wstr
; res = GdipPrivateAddFontFile(fontCollection, filename)
; fontCollection : GpFontCollection* in/out -> "var"
; filename : LPCWSTR -> "wstr"
; ※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")
	procGdipPrivateAddFontFile = gdiplus.NewProc("GdipPrivateAddFontFile")
)

// fontCollection (GpFontCollection* in/out), filename (LPCWSTR)
r1, _, err := procGdipPrivateAddFontFile.Call(
	uintptr(fontCollection),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(filename))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipPrivateAddFontFile(
  fontCollection: Pointer;   // GpFontCollection* in/out
  filename: PWideChar   // LPCWSTR
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipPrivateAddFontFile';

result := DllCall("gdiplus\GdipPrivateAddFontFile"
    , "Ptr", fontCollection   ; GpFontCollection* in/out
    , "WStr", filename   ; LPCWSTR
    , "Int")   ; return: Status

●GdipPrivateAddFontFile(fontCollection, filename) = DLL("gdiplus.dll", "int GdipPrivateAddFontFile(void*, char*)")
# 呼び出し: GdipPrivateAddFontFile(fontCollection, filename)
# fontCollection : GpFontCollection* in/out -> "void*"
# filename : LPCWSTR -> "char*"
# 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)。