CMCreateTransformExtW

// ICM32.dll  (Unicode / -W)
#include <windows.h>

INT_PTR CMCreateTransformExtW(
    LOGCOLORSPACEW* lpColorSpace,
    void* lpDevCharacter,
    void* lpTargetDevCharacter,
    DWORD dwFlags
);

<DllImport("ICM32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function CMCreateTransformExtW(
    lpColorSpace As IntPtr,   ' LOGCOLORSPACEW*
    lpDevCharacter As IntPtr,   ' void*
    lpTargetDevCharacter As IntPtr,   ' void*
    dwFlags As UInteger   ' DWORD
) As IntPtr
End Function

' lpColorSpace : LOGCOLORSPACEW*
' lpDevCharacter : void*
' lpTargetDevCharacter : void*
' dwFlags : DWORD
Declare PtrSafe Function CMCreateTransformExtW Lib "icm32" ( _
    ByVal lpColorSpace As LongPtr, _
    ByVal lpDevCharacter As LongPtr, _
    ByVal lpTargetDevCharacter As LongPtr, _
    ByVal dwFlags As Long) 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

CMCreateTransformExtW = ctypes.windll.icm32.CMCreateTransformExtW
CMCreateTransformExtW.restype = ctypes.c_ssize_t
CMCreateTransformExtW.argtypes = [
    ctypes.c_void_p,  # lpColorSpace : LOGCOLORSPACEW*
    ctypes.POINTER(None),  # lpDevCharacter : void*
    ctypes.POINTER(None),  # lpTargetDevCharacter : void*
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ICM32.dll')
CMCreateTransformExtW = Fiddle::Function.new(
  lib['CMCreateTransformExtW'],
  [
    Fiddle::TYPE_VOIDP,  # lpColorSpace : LOGCOLORSPACEW*
    Fiddle::TYPE_VOIDP,  # lpDevCharacter : void*
    Fiddle::TYPE_VOIDP,  # lpTargetDevCharacter : void*
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INTPTR_T)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "icm32")]
extern "system" {
    fn CMCreateTransformExtW(
        lpColorSpace: *mut LOGCOLORSPACEW,  // LOGCOLORSPACEW*
        lpDevCharacter: *mut (),  // void*
        lpTargetDevCharacter: *mut (),  // void*
        dwFlags: u32  // DWORD
    ) -> isize;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ICM32.dll", CharSet = CharSet.Unicode)]
public static extern IntPtr CMCreateTransformExtW(IntPtr lpColorSpace, IntPtr lpDevCharacter, IntPtr lpTargetDevCharacter, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ICM32_CMCreateTransformExtW' -Namespace Win32 -PassThru
# $api::CMCreateTransformExtW(lpColorSpace, lpDevCharacter, lpTargetDevCharacter, dwFlags)

#uselib "ICM32.dll"
#func global CMCreateTransformExtW "CMCreateTransformExtW" wptr, wptr, wptr, wptr
; CMCreateTransformExtW varptr(lpColorSpace), lpDevCharacter, lpTargetDevCharacter, dwFlags   ; 戻り値は stat
; lpColorSpace : LOGCOLORSPACEW* -> "wptr"
; lpDevCharacter : void* -> "wptr"
; lpTargetDevCharacter : void* -> "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 "ICM32.dll"
#cfunc global CMCreateTransformExtW "CMCreateTransformExtW" var, sptr, sptr, int
; res = CMCreateTransformExtW(lpColorSpace, lpDevCharacter, lpTargetDevCharacter, dwFlags)
; lpColorSpace : LOGCOLORSPACEW* -> "var"
; lpDevCharacter : void* -> "sptr"
; lpTargetDevCharacter : void* -> "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_PTR CMCreateTransformExtW(LOGCOLORSPACEW* lpColorSpace, void* lpDevCharacter, void* lpTargetDevCharacter, DWORD dwFlags)
#uselib "ICM32.dll"
#cfunc global CMCreateTransformExtW "CMCreateTransformExtW" var, intptr, intptr, int
; res = CMCreateTransformExtW(lpColorSpace, lpDevCharacter, lpTargetDevCharacter, dwFlags)
; lpColorSpace : LOGCOLORSPACEW* -> "var"
; lpDevCharacter : void* -> "intptr"
; lpTargetDevCharacter : void* -> "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 (
	icm32 = windows.NewLazySystemDLL("ICM32.dll")
	procCMCreateTransformExtW = icm32.NewProc("CMCreateTransformExtW")
)

// lpColorSpace (LOGCOLORSPACEW*), lpDevCharacter (void*), lpTargetDevCharacter (void*), dwFlags (DWORD)
r1, _, err := procCMCreateTransformExtW.Call(
	uintptr(lpColorSpace),
	uintptr(lpDevCharacter),
	uintptr(lpTargetDevCharacter),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT_PTR

function CMCreateTransformExtW(
  lpColorSpace: Pointer;   // LOGCOLORSPACEW*
  lpDevCharacter: Pointer;   // void*
  lpTargetDevCharacter: Pointer;   // void*
  dwFlags: DWORD   // DWORD
): NativeInt; stdcall;
  external 'ICM32.dll' name 'CMCreateTransformExtW';

result := DllCall("ICM32\CMCreateTransformExtW"
    , "Ptr", lpColorSpace   ; LOGCOLORSPACEW*
    , "Ptr", lpDevCharacter   ; void*
    , "Ptr", lpTargetDevCharacter   ; void*
    , "UInt", dwFlags   ; DWORD
    , "Ptr")   ; return: INT_PTR

●CMCreateTransformExtW(lpColorSpace, lpDevCharacter, lpTargetDevCharacter, dwFlags) = DLL("ICM32.dll", "int CMCreateTransformExtW(void*, void*, void*, dword)")
# 呼び出し: CMCreateTransformExtW(lpColorSpace, lpDevCharacter, lpTargetDevCharacter, dwFlags)
# lpColorSpace : LOGCOLORSPACEW* -> "void*"
# lpDevCharacter : void* -> "void*"
# lpTargetDevCharacter : void* -> "void*"
# 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。