BuildCommDCBW

// KERNEL32.dll  (Unicode / -W)
#include <windows.h>

BOOL BuildCommDCBW(
    LPCWSTR lpDef,
    DCB* lpDCB
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function BuildCommDCBW(
    <MarshalAs(UnmanagedType.LPWStr)> lpDef As String,   ' LPCWSTR
    lpDCB As IntPtr   ' DCB* out
) As Boolean
End Function

' lpDef : LPCWSTR
' lpDCB : DCB* out
Declare PtrSafe Function BuildCommDCBW Lib "kernel32" ( _
    ByVal lpDef As LongPtr, _
    ByVal lpDCB 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

BuildCommDCBW = ctypes.windll.kernel32.BuildCommDCBW
BuildCommDCBW.restype = wintypes.BOOL
BuildCommDCBW.argtypes = [
    wintypes.LPCWSTR,  # lpDef : LPCWSTR
    ctypes.c_void_p,  # lpDCB : DCB* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
BuildCommDCBW = Fiddle::Function.new(
  lib['BuildCommDCBW'],
  [
    Fiddle::TYPE_VOIDP,  # lpDef : LPCWSTR
    Fiddle::TYPE_VOIDP,  # lpDCB : DCB* out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "kernel32")]
extern "system" {
    fn BuildCommDCBW(
        lpDef: *const u16,  // LPCWSTR
        lpDCB: *mut DCB  // DCB* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool BuildCommDCBW([MarshalAs(UnmanagedType.LPWStr)] string lpDef, IntPtr lpDCB);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_BuildCommDCBW' -Namespace Win32 -PassThru
# $api::BuildCommDCBW(lpDef, lpDCB)

#uselib "KERNEL32.dll"
#func global BuildCommDCBW "BuildCommDCBW" wptr, wptr
; BuildCommDCBW lpDef, varptr(lpDCB)   ; 戻り値は stat
; lpDef : LPCWSTR -> "wptr"
; lpDCB : DCB* out -> "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 "KERNEL32.dll"
#cfunc global BuildCommDCBW "BuildCommDCBW" wstr, var
; res = BuildCommDCBW(lpDef, lpDCB)
; lpDef : LPCWSTR -> "wstr"
; lpDCB : DCB* out -> "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。

; BOOL BuildCommDCBW(LPCWSTR lpDef, DCB* lpDCB)
#uselib "KERNEL32.dll"
#cfunc global BuildCommDCBW "BuildCommDCBW" wstr, var
; res = BuildCommDCBW(lpDef, lpDCB)
; lpDef : LPCWSTR -> "wstr"
; lpDCB : DCB* out -> "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 (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procBuildCommDCBW = kernel32.NewProc("BuildCommDCBW")
)

// lpDef (LPCWSTR), lpDCB (DCB* out)
r1, _, err := procBuildCommDCBW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpDef))),
	uintptr(lpDCB),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function BuildCommDCBW(
  lpDef: PWideChar;   // LPCWSTR
  lpDCB: Pointer   // DCB* out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'BuildCommDCBW';

result := DllCall("KERNEL32\BuildCommDCBW"
    , "WStr", lpDef   ; LPCWSTR
    , "Ptr", lpDCB   ; DCB* out
    , "Int")   ; return: BOOL

●BuildCommDCBW(lpDef, lpDCB) = DLL("KERNEL32.dll", "bool BuildCommDCBW(char*, void*)")
# 呼び出し: BuildCommDCBW(lpDef, lpDCB)
# lpDef : LPCWSTR -> "char*"
# lpDCB : DCB* out -> "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。