CreateDCW

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

HDC CreateDCW(
    LPCWSTR pwszDriver,   // optional
    LPCWSTR pwszDevice,   // optional
    LPCWSTR pszPort,   // optional
    const DEVMODEW* pdm   // optional
);

<DllImport("GDI32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function CreateDCW(
    <MarshalAs(UnmanagedType.LPWStr)> pwszDriver As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> pwszDevice As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> pszPort As String,   ' LPCWSTR optional
    pdm As IntPtr   ' DEVMODEW* optional
) As IntPtr
End Function

' pwszDriver : LPCWSTR optional
' pwszDevice : LPCWSTR optional
' pszPort : LPCWSTR optional
' pdm : DEVMODEW* optional
Declare PtrSafe Function CreateDCW Lib "gdi32" ( _
    ByVal pwszDriver As LongPtr, _
    ByVal pwszDevice As LongPtr, _
    ByVal pszPort As LongPtr, _
    ByVal pdm As LongPtr) As LongPtr
' 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

CreateDCW = ctypes.windll.gdi32.CreateDCW
CreateDCW.restype = ctypes.c_void_p
CreateDCW.argtypes = [
    wintypes.LPCWSTR,  # pwszDriver : LPCWSTR optional
    wintypes.LPCWSTR,  # pwszDevice : LPCWSTR optional
    wintypes.LPCWSTR,  # pszPort : LPCWSTR optional
    ctypes.c_void_p,  # pdm : DEVMODEW* optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
CreateDCW = Fiddle::Function.new(
  lib['CreateDCW'],
  [
    Fiddle::TYPE_VOIDP,  # pwszDriver : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # pwszDevice : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # pszPort : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # pdm : DEVMODEW* optional
  ],
  Fiddle::TYPE_VOIDP)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "gdi32")]
extern "system" {
    fn CreateDCW(
        pwszDriver: *const u16,  // LPCWSTR optional
        pwszDevice: *const u16,  // LPCWSTR optional
        pszPort: *const u16,  // LPCWSTR optional
        pdm: *const DEVMODEW  // DEVMODEW* optional
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("GDI32.dll", CharSet = CharSet.Unicode)]
public static extern IntPtr CreateDCW([MarshalAs(UnmanagedType.LPWStr)] string pwszDriver, [MarshalAs(UnmanagedType.LPWStr)] string pwszDevice, [MarshalAs(UnmanagedType.LPWStr)] string pszPort, IntPtr pdm);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_CreateDCW' -Namespace Win32 -PassThru
# $api::CreateDCW(pwszDriver, pwszDevice, pszPort, pdm)

#uselib "GDI32.dll"
#func global CreateDCW "CreateDCW" wptr, wptr, wptr, wptr
; CreateDCW pwszDriver, pwszDevice, pszPort, varptr(pdm)   ; 戻り値は stat
; pwszDriver : LPCWSTR optional -> "wptr"
; pwszDevice : LPCWSTR optional -> "wptr"
; pszPort : LPCWSTR optional -> "wptr"
; pdm : DEVMODEW* optional -> "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 CreateDCW "CreateDCW" wstr, wstr, wstr, var
; res = CreateDCW(pwszDriver, pwszDevice, pszPort, pdm)
; pwszDriver : LPCWSTR optional -> "wstr"
; pwszDevice : LPCWSTR optional -> "wstr"
; pszPort : LPCWSTR optional -> "wstr"
; pdm : DEVMODEW* optional -> "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。

; HDC CreateDCW(LPCWSTR pwszDriver, LPCWSTR pwszDevice, LPCWSTR pszPort, DEVMODEW* pdm)
#uselib "GDI32.dll"
#cfunc global CreateDCW "CreateDCW" wstr, wstr, wstr, var
; res = CreateDCW(pwszDriver, pwszDevice, pszPort, pdm)
; pwszDriver : LPCWSTR optional -> "wstr"
; pwszDevice : LPCWSTR optional -> "wstr"
; pszPort : LPCWSTR optional -> "wstr"
; pdm : DEVMODEW* optional -> "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 (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procCreateDCW = gdi32.NewProc("CreateDCW")
)

// pwszDriver (LPCWSTR optional), pwszDevice (LPCWSTR optional), pszPort (LPCWSTR optional), pdm (DEVMODEW* optional)
r1, _, err := procCreateDCW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwszDriver))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwszDevice))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszPort))),
	uintptr(pdm),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HDC

function CreateDCW(
  pwszDriver: PWideChar;   // LPCWSTR optional
  pwszDevice: PWideChar;   // LPCWSTR optional
  pszPort: PWideChar;   // LPCWSTR optional
  pdm: Pointer   // DEVMODEW* optional
): THandle; stdcall;
  external 'GDI32.dll' name 'CreateDCW';

result := DllCall("GDI32\CreateDCW"
    , "WStr", pwszDriver   ; LPCWSTR optional
    , "WStr", pwszDevice   ; LPCWSTR optional
    , "WStr", pszPort   ; LPCWSTR optional
    , "Ptr", pdm   ; DEVMODEW* optional
    , "Ptr")   ; return: HDC

●CreateDCW(pwszDriver, pwszDevice, pszPort, pdm) = DLL("GDI32.dll", "void* CreateDCW(char*, char*, char*, void*)")
# 呼び出し: CreateDCW(pwszDriver, pwszDevice, pszPort, pdm)
# pwszDriver : LPCWSTR optional -> "char*"
# pwszDevice : LPCWSTR optional -> "char*"
# pszPort : LPCWSTR optional -> "char*"
# pdm : DEVMODEW* optional -> "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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。