EnumFontFamiliesW

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

INT EnumFontFamiliesW(
    HDC hdc,
    LPCWSTR lpLogfont,   // optional
    FONTENUMPROCW lpProc,
    LPARAM lParam
);

<DllImport("GDI32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function EnumFontFamiliesW(
    hdc As IntPtr,   ' HDC
    <MarshalAs(UnmanagedType.LPWStr)> lpLogfont As String,   ' LPCWSTR optional
    lpProc As IntPtr,   ' FONTENUMPROCW
    lParam As IntPtr   ' LPARAM
) As Integer
End Function

' hdc : HDC
' lpLogfont : LPCWSTR optional
' lpProc : FONTENUMPROCW
' lParam : LPARAM
Declare PtrSafe Function EnumFontFamiliesW Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal lpLogfont As LongPtr, _
    ByVal lpProc As LongPtr, _
    ByVal lParam As LongPtr) 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

EnumFontFamiliesW = ctypes.windll.gdi32.EnumFontFamiliesW
EnumFontFamiliesW.restype = ctypes.c_int
EnumFontFamiliesW.argtypes = [
    wintypes.HANDLE,  # hdc : HDC
    wintypes.LPCWSTR,  # lpLogfont : LPCWSTR optional
    ctypes.c_void_p,  # lpProc : FONTENUMPROCW
    ctypes.c_ssize_t,  # lParam : LPARAM
]

require 'fiddle'
require 'fiddle/import'

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

#[link(name = "gdi32")]
extern "system" {
    fn EnumFontFamiliesW(
        hdc: *mut core::ffi::c_void,  // HDC
        lpLogfont: *const u16,  // LPCWSTR optional
        lpProc: *const core::ffi::c_void,  // FONTENUMPROCW
        lParam: isize  // LPARAM
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("GDI32.dll", CharSet = CharSet.Unicode)]
public static extern int EnumFontFamiliesW(IntPtr hdc, [MarshalAs(UnmanagedType.LPWStr)] string lpLogfont, IntPtr lpProc, IntPtr lParam);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_EnumFontFamiliesW' -Namespace Win32 -PassThru
# $api::EnumFontFamiliesW(hdc, lpLogfont, lpProc, lParam)

#uselib "GDI32.dll"
#func global EnumFontFamiliesW "EnumFontFamiliesW" wptr, wptr, wptr, wptr
; EnumFontFamiliesW hdc, lpLogfont, lpProc, lParam   ; 戻り値は stat
; hdc : HDC -> "wptr"
; lpLogfont : LPCWSTR optional -> "wptr"
; lpProc : FONTENUMPROCW -> "wptr"
; lParam : LPARAM -> "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 EnumFontFamiliesW "EnumFontFamiliesW" sptr, wstr, sptr, sptr
; res = EnumFontFamiliesW(hdc, lpLogfont, lpProc, lParam)
; hdc : HDC -> "sptr"
; lpLogfont : LPCWSTR optional -> "wstr"
; lpProc : FONTENUMPROCW -> "sptr"
; lParam : LPARAM -> "sptr"

; INT EnumFontFamiliesW(HDC hdc, LPCWSTR lpLogfont, FONTENUMPROCW lpProc, LPARAM lParam)
#uselib "GDI32.dll"
#cfunc global EnumFontFamiliesW "EnumFontFamiliesW" intptr, wstr, intptr, intptr
; res = EnumFontFamiliesW(hdc, lpLogfont, lpProc, lParam)
; hdc : HDC -> "intptr"
; lpLogfont : LPCWSTR optional -> "wstr"
; lpProc : FONTENUMPROCW -> "intptr"
; lParam : LPARAM -> "intptr"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procEnumFontFamiliesW = gdi32.NewProc("EnumFontFamiliesW")
)

// hdc (HDC), lpLogfont (LPCWSTR optional), lpProc (FONTENUMPROCW), lParam (LPARAM)
r1, _, err := procEnumFontFamiliesW.Call(
	uintptr(hdc),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpLogfont))),
	uintptr(lpProc),
	uintptr(lParam),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function EnumFontFamiliesW(
  hdc: THandle;   // HDC
  lpLogfont: PWideChar;   // LPCWSTR optional
  lpProc: Pointer;   // FONTENUMPROCW
  lParam: NativeInt   // LPARAM
): Integer; stdcall;
  external 'GDI32.dll' name 'EnumFontFamiliesW';

result := DllCall("GDI32\EnumFontFamiliesW"
    , "Ptr", hdc   ; HDC
    , "WStr", lpLogfont   ; LPCWSTR optional
    , "Ptr", lpProc   ; FONTENUMPROCW
    , "Ptr", lParam   ; LPARAM
    , "Int")   ; return: INT

●EnumFontFamiliesW(hdc, lpLogfont, lpProc, lParam) = DLL("GDI32.dll", "int EnumFontFamiliesW(void*, char*, void*, int)")
# 呼び出し: EnumFontFamiliesW(hdc, lpLogfont, lpProc, lParam)
# hdc : HDC -> "void*"
# lpLogfont : LPCWSTR optional -> "char*"
# lpProc : FONTENUMPROCW -> "void*"
# lParam : LPARAM -> "int"
# 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。