TTCharToUnicode

// t2embed.dll
#include <windows.h>

INT TTCharToUnicode(
    HDC hDC,
    BYTE* pucCharCodes,
    DWORD ulCharCodeSize,
    WORD* pusShortCodes,
    DWORD ulShortCodeSize,
    DWORD ulFlags
);

<DllImport("t2embed.dll", ExactSpelling:=True)>
Public Shared Function TTCharToUnicode(
    hDC As IntPtr,   ' HDC
    pucCharCodes As IntPtr,   ' BYTE*
    ulCharCodeSize As UInteger,   ' DWORD
    <Out> ByRef pusShortCodes As UShort,   ' WORD* out
    ulShortCodeSize As UInteger,   ' DWORD
    ulFlags As UInteger   ' DWORD
) As Integer
End Function

' hDC : HDC
' pucCharCodes : BYTE*
' ulCharCodeSize : DWORD
' pusShortCodes : WORD* out
' ulShortCodeSize : DWORD
' ulFlags : DWORD
Declare PtrSafe Function TTCharToUnicode Lib "t2embed" ( _
    ByVal hDC As LongPtr, _
    ByVal pucCharCodes As LongPtr, _
    ByVal ulCharCodeSize As Long, _
    ByRef pusShortCodes As Integer, _
    ByVal ulShortCodeSize As Long, _
    ByVal ulFlags As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

TTCharToUnicode = ctypes.windll.t2embed.TTCharToUnicode
TTCharToUnicode.restype = ctypes.c_int
TTCharToUnicode.argtypes = [
    wintypes.HANDLE,  # hDC : HDC
    ctypes.POINTER(ctypes.c_ubyte),  # pucCharCodes : BYTE*
    wintypes.DWORD,  # ulCharCodeSize : DWORD
    ctypes.POINTER(ctypes.c_ushort),  # pusShortCodes : WORD* out
    wintypes.DWORD,  # ulShortCodeSize : DWORD
    wintypes.DWORD,  # ulFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('t2embed.dll')
TTCharToUnicode = Fiddle::Function.new(
  lib['TTCharToUnicode'],
  [
    Fiddle::TYPE_VOIDP,  # hDC : HDC
    Fiddle::TYPE_VOIDP,  # pucCharCodes : BYTE*
    -Fiddle::TYPE_INT,  # ulCharCodeSize : DWORD
    Fiddle::TYPE_VOIDP,  # pusShortCodes : WORD* out
    -Fiddle::TYPE_INT,  # ulShortCodeSize : DWORD
    -Fiddle::TYPE_INT,  # ulFlags : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "t2embed")]
extern "system" {
    fn TTCharToUnicode(
        hDC: *mut core::ffi::c_void,  // HDC
        pucCharCodes: *mut u8,  // BYTE*
        ulCharCodeSize: u32,  // DWORD
        pusShortCodes: *mut u16,  // WORD* out
        ulShortCodeSize: u32,  // DWORD
        ulFlags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("t2embed.dll")]
public static extern int TTCharToUnicode(IntPtr hDC, IntPtr pucCharCodes, uint ulCharCodeSize, out ushort pusShortCodes, uint ulShortCodeSize, uint ulFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 't2embed_TTCharToUnicode' -Namespace Win32 -PassThru
# $api::TTCharToUnicode(hDC, pucCharCodes, ulCharCodeSize, pusShortCodes, ulShortCodeSize, ulFlags)

#uselib "t2embed.dll"
#func global TTCharToUnicode "TTCharToUnicode" sptr, sptr, sptr, sptr, sptr, sptr
; TTCharToUnicode hDC, varptr(pucCharCodes), ulCharCodeSize, varptr(pusShortCodes), ulShortCodeSize, ulFlags   ; 戻り値は stat
; hDC : HDC -> "sptr"
; pucCharCodes : BYTE* -> "sptr"
; ulCharCodeSize : DWORD -> "sptr"
; pusShortCodes : WORD* out -> "sptr"
; ulShortCodeSize : DWORD -> "sptr"
; ulFlags : DWORD -> "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 "t2embed.dll"
#cfunc global TTCharToUnicode "TTCharToUnicode" sptr, var, int, var, int, int
; res = TTCharToUnicode(hDC, pucCharCodes, ulCharCodeSize, pusShortCodes, ulShortCodeSize, ulFlags)
; hDC : HDC -> "sptr"
; pucCharCodes : BYTE* -> "var"
; ulCharCodeSize : DWORD -> "int"
; pusShortCodes : WORD* out -> "var"
; ulShortCodeSize : DWORD -> "int"
; ulFlags : 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 TTCharToUnicode(HDC hDC, BYTE* pucCharCodes, DWORD ulCharCodeSize, WORD* pusShortCodes, DWORD ulShortCodeSize, DWORD ulFlags)
#uselib "t2embed.dll"
#cfunc global TTCharToUnicode "TTCharToUnicode" intptr, var, int, var, int, int
; res = TTCharToUnicode(hDC, pucCharCodes, ulCharCodeSize, pusShortCodes, ulShortCodeSize, ulFlags)
; hDC : HDC -> "intptr"
; pucCharCodes : BYTE* -> "var"
; ulCharCodeSize : DWORD -> "int"
; pusShortCodes : WORD* out -> "var"
; ulShortCodeSize : DWORD -> "int"
; ulFlags : 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 (
	t2embed = windows.NewLazySystemDLL("t2embed.dll")
	procTTCharToUnicode = t2embed.NewProc("TTCharToUnicode")
)

// hDC (HDC), pucCharCodes (BYTE*), ulCharCodeSize (DWORD), pusShortCodes (WORD* out), ulShortCodeSize (DWORD), ulFlags (DWORD)
r1, _, err := procTTCharToUnicode.Call(
	uintptr(hDC),
	uintptr(pucCharCodes),
	uintptr(ulCharCodeSize),
	uintptr(pusShortCodes),
	uintptr(ulShortCodeSize),
	uintptr(ulFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function TTCharToUnicode(
  hDC: THandle;   // HDC
  pucCharCodes: Pointer;   // BYTE*
  ulCharCodeSize: DWORD;   // DWORD
  pusShortCodes: Pointer;   // WORD* out
  ulShortCodeSize: DWORD;   // DWORD
  ulFlags: DWORD   // DWORD
): Integer; stdcall;
  external 't2embed.dll' name 'TTCharToUnicode';

result := DllCall("t2embed\TTCharToUnicode"
    , "Ptr", hDC   ; HDC
    , "Ptr", pucCharCodes   ; BYTE*
    , "UInt", ulCharCodeSize   ; DWORD
    , "Ptr", pusShortCodes   ; WORD* out
    , "UInt", ulShortCodeSize   ; DWORD
    , "UInt", ulFlags   ; DWORD
    , "Int")   ; return: INT

●TTCharToUnicode(hDC, pucCharCodes, ulCharCodeSize, pusShortCodes, ulShortCodeSize, ulFlags) = DLL("t2embed.dll", "int TTCharToUnicode(void*, void*, dword, void*, dword, dword)")
# 呼び出し: TTCharToUnicode(hDC, pucCharCodes, ulCharCodeSize, pusShortCodes, ulShortCodeSize, ulFlags)
# hDC : HDC -> "void*"
# pucCharCodes : BYTE* -> "void*"
# ulCharCodeSize : DWORD -> "dword"
# pusShortCodes : WORD* out -> "void*"
# ulShortCodeSize : DWORD -> "dword"
# ulFlags : 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)。