EnumFontFamiliesExW

// GDI32.dll  (Unicode / -W)
#include <windows.h>

INT EnumFontFamiliesExW(
    HDC hdc,
    LOGFONTW* lpLogfont,
    FONTENUMPROCW lpProc,
    LPARAM lParam,
    DWORD dwFlags
);

<DllImport("GDI32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function EnumFontFamiliesExW(
    hdc As IntPtr,   ' HDC
    lpLogfont As IntPtr,   ' LOGFONTW*
    lpProc As IntPtr,   ' FONTENUMPROCW
    lParam As IntPtr,   ' LPARAM
    dwFlags As UInteger   ' DWORD
) As Integer
End Function

' hdc : HDC
' lpLogfont : LOGFONTW*
' lpProc : FONTENUMPROCW
' lParam : LPARAM
' dwFlags : DWORD
Declare PtrSafe Function EnumFontFamiliesExW Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal lpLogfont As LongPtr, _
    ByVal lpProc As LongPtr, _
    ByVal lParam As LongPtr, _
    ByVal dwFlags As Long) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

EnumFontFamiliesExW = ctypes.windll.gdi32.EnumFontFamiliesExW
EnumFontFamiliesExW.restype = ctypes.c_int
EnumFontFamiliesExW.argtypes = [
    wintypes.HANDLE,  # hdc : HDC
    ctypes.c_void_p,  # lpLogfont : LOGFONTW*
    ctypes.c_void_p,  # lpProc : FONTENUMPROCW
    ctypes.c_ssize_t,  # lParam : LPARAM
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
EnumFontFamiliesExW = Fiddle::Function.new(
  lib['EnumFontFamiliesExW'],
  [
    Fiddle::TYPE_VOIDP,  # hdc : HDC
    Fiddle::TYPE_VOIDP,  # lpLogfont : LOGFONTW*
    Fiddle::TYPE_VOIDP,  # lpProc : FONTENUMPROCW
    Fiddle::TYPE_INTPTR_T,  # lParam : LPARAM
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "gdi32")]
extern "system" {
    fn EnumFontFamiliesExW(
        hdc: *mut core::ffi::c_void,  // HDC
        lpLogfont: *mut LOGFONTW,  // LOGFONTW*
        lpProc: *const core::ffi::c_void,  // FONTENUMPROCW
        lParam: isize,  // LPARAM
        dwFlags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("GDI32.dll", CharSet = CharSet.Unicode)]
public static extern int EnumFontFamiliesExW(IntPtr hdc, IntPtr lpLogfont, IntPtr lpProc, IntPtr lParam, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_EnumFontFamiliesExW' -Namespace Win32 -PassThru
# $api::EnumFontFamiliesExW(hdc, lpLogfont, lpProc, lParam, dwFlags)

#uselib "GDI32.dll"
#func global EnumFontFamiliesExW "EnumFontFamiliesExW" wptr, wptr, wptr, wptr, wptr
; EnumFontFamiliesExW hdc, varptr(lpLogfont), lpProc, lParam, dwFlags   ; 戻り値は stat
; hdc : HDC -> "wptr"
; lpLogfont : LOGFONTW* -> "wptr"
; lpProc : FONTENUMPROCW -> "wptr"
; lParam : LPARAM -> "wptr"
; dwFlags : DWORD -> "wptr"
; ※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 EnumFontFamiliesExW "EnumFontFamiliesExW" sptr, var, sptr, sptr, int
; res = EnumFontFamiliesExW(hdc, lpLogfont, lpProc, lParam, dwFlags)
; hdc : HDC -> "sptr"
; lpLogfont : LOGFONTW* -> "var"
; lpProc : FONTENUMPROCW -> "sptr"
; lParam : LPARAM -> "sptr"
; dwFlags : DWORD -> "int"
; ※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。

; INT EnumFontFamiliesExW(HDC hdc, LOGFONTW* lpLogfont, FONTENUMPROCW lpProc, LPARAM lParam, DWORD dwFlags)
#uselib "GDI32.dll"
#cfunc global EnumFontFamiliesExW "EnumFontFamiliesExW" intptr, var, intptr, intptr, int
; res = EnumFontFamiliesExW(hdc, lpLogfont, lpProc, lParam, dwFlags)
; hdc : HDC -> "intptr"
; lpLogfont : LOGFONTW* -> "var"
; lpProc : FONTENUMPROCW -> "intptr"
; lParam : LPARAM -> "intptr"
; dwFlags : DWORD -> "int"
; ※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")
	procEnumFontFamiliesExW = gdi32.NewProc("EnumFontFamiliesExW")
)

// hdc (HDC), lpLogfont (LOGFONTW*), lpProc (FONTENUMPROCW), lParam (LPARAM), dwFlags (DWORD)
r1, _, err := procEnumFontFamiliesExW.Call(
	uintptr(hdc),
	uintptr(lpLogfont),
	uintptr(lpProc),
	uintptr(lParam),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function EnumFontFamiliesExW(
  hdc: THandle;   // HDC
  lpLogfont: Pointer;   // LOGFONTW*
  lpProc: Pointer;   // FONTENUMPROCW
  lParam: NativeInt;   // LPARAM
  dwFlags: DWORD   // DWORD
): Integer; stdcall;
  external 'GDI32.dll' name 'EnumFontFamiliesExW';

result := DllCall("GDI32\EnumFontFamiliesExW"
    , "Ptr", hdc   ; HDC
    , "Ptr", lpLogfont   ; LOGFONTW*
    , "Ptr", lpProc   ; FONTENUMPROCW
    , "Ptr", lParam   ; LPARAM
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: INT

●EnumFontFamiliesExW(hdc, lpLogfont, lpProc, lParam, dwFlags) = DLL("GDI32.dll", "int EnumFontFamiliesExW(void*, void*, void*, int, dword)")
# 呼び出し: EnumFontFamiliesExW(hdc, lpLogfont, lpProc, lParam, dwFlags)
# hdc : HDC -> "void*"
# lpLogfont : LOGFONTW* -> "void*"
# lpProc : FONTENUMPROCW -> "void*"
# lParam : LPARAM -> "int"
# dwFlags : 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。