WsAddCustomHeader

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

HRESULT WsAddCustomHeader(
    WS_MESSAGE* message,
    const WS_ELEMENT_DESCRIPTION* headerDescription,
    WS_WRITE_OPTION writeOption,
    const void* value,
    DWORD valueSize,
    DWORD headerAttributes,
    WS_ERROR* error   // optional
);

<DllImport("webservices.dll", ExactSpelling:=True)>
Public Shared Function WsAddCustomHeader(
    ByRef message As IntPtr,   ' WS_MESSAGE*
    headerDescription As IntPtr,   ' WS_ELEMENT_DESCRIPTION*
    writeOption As Integer,   ' WS_WRITE_OPTION
    value As IntPtr,   ' void*
    valueSize As UInteger,   ' DWORD
    headerAttributes As UInteger,   ' DWORD
    [error] As IntPtr   ' WS_ERROR* optional
) As Integer
End Function

' message : WS_MESSAGE*
' headerDescription : WS_ELEMENT_DESCRIPTION*
' writeOption : WS_WRITE_OPTION
' value : void*
' valueSize : DWORD
' headerAttributes : DWORD
' error : WS_ERROR* optional
Declare PtrSafe Function WsAddCustomHeader Lib "webservices" ( _
    ByRef message As LongPtr, _
    ByVal headerDescription As LongPtr, _
    ByVal writeOption As Long, _
    ByVal value As LongPtr, _
    ByVal valueSize As Long, _
    ByVal headerAttributes As Long, _
    ByVal error As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

WsAddCustomHeader = ctypes.windll.webservices.WsAddCustomHeader
WsAddCustomHeader.restype = ctypes.c_int
WsAddCustomHeader.argtypes = [
    ctypes.c_void_p,  # message : WS_MESSAGE*
    ctypes.c_void_p,  # headerDescription : WS_ELEMENT_DESCRIPTION*
    ctypes.c_int,  # writeOption : WS_WRITE_OPTION
    ctypes.POINTER(None),  # value : void*
    wintypes.DWORD,  # valueSize : DWORD
    wintypes.DWORD,  # headerAttributes : DWORD
    ctypes.c_void_p,  # error : WS_ERROR* optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('webservices.dll')
WsAddCustomHeader = Fiddle::Function.new(
  lib['WsAddCustomHeader'],
  [
    Fiddle::TYPE_VOIDP,  # message : WS_MESSAGE*
    Fiddle::TYPE_VOIDP,  # headerDescription : WS_ELEMENT_DESCRIPTION*
    Fiddle::TYPE_INT,  # writeOption : WS_WRITE_OPTION
    Fiddle::TYPE_VOIDP,  # value : void*
    -Fiddle::TYPE_INT,  # valueSize : DWORD
    -Fiddle::TYPE_INT,  # headerAttributes : DWORD
    Fiddle::TYPE_VOIDP,  # error : WS_ERROR* optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "webservices")]
extern "system" {
    fn WsAddCustomHeader(
        message: *mut isize,  // WS_MESSAGE*
        headerDescription: *const WS_ELEMENT_DESCRIPTION,  // WS_ELEMENT_DESCRIPTION*
        writeOption: i32,  // WS_WRITE_OPTION
        value: *const (),  // void*
        valueSize: u32,  // DWORD
        headerAttributes: u32,  // DWORD
        error: *mut isize  // WS_ERROR* optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("webservices.dll")]
public static extern int WsAddCustomHeader(ref IntPtr message, IntPtr headerDescription, int writeOption, IntPtr value, uint valueSize, uint headerAttributes, IntPtr error);
"@
$api = Add-Type -MemberDefinition $sig -Name 'webservices_WsAddCustomHeader' -Namespace Win32 -PassThru
# $api::WsAddCustomHeader(message, headerDescription, writeOption, value, valueSize, headerAttributes, error)

#uselib "webservices.dll"
#func global WsAddCustomHeader "WsAddCustomHeader" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; WsAddCustomHeader message, varptr(headerDescription), writeOption, value, valueSize, headerAttributes, error   ; 戻り値は stat
; message : WS_MESSAGE* -> "sptr"
; headerDescription : WS_ELEMENT_DESCRIPTION* -> "sptr"
; writeOption : WS_WRITE_OPTION -> "sptr"
; value : void* -> "sptr"
; valueSize : DWORD -> "sptr"
; headerAttributes : DWORD -> "sptr"
; error : WS_ERROR* optional -> "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 "webservices.dll"
#cfunc global WsAddCustomHeader "WsAddCustomHeader" int, var, int, sptr, int, int, int
; res = WsAddCustomHeader(message, headerDescription, writeOption, value, valueSize, headerAttributes, error)
; message : WS_MESSAGE* -> "int"
; headerDescription : WS_ELEMENT_DESCRIPTION* -> "var"
; writeOption : WS_WRITE_OPTION -> "int"
; value : void* -> "sptr"
; valueSize : DWORD -> "int"
; headerAttributes : DWORD -> "int"
; error : WS_ERROR* optional -> "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。

; HRESULT WsAddCustomHeader(WS_MESSAGE* message, WS_ELEMENT_DESCRIPTION* headerDescription, WS_WRITE_OPTION writeOption, void* value, DWORD valueSize, DWORD headerAttributes, WS_ERROR* error)
#uselib "webservices.dll"
#cfunc global WsAddCustomHeader "WsAddCustomHeader" int, var, int, intptr, int, int, int
; res = WsAddCustomHeader(message, headerDescription, writeOption, value, valueSize, headerAttributes, error)
; message : WS_MESSAGE* -> "int"
; headerDescription : WS_ELEMENT_DESCRIPTION* -> "var"
; writeOption : WS_WRITE_OPTION -> "int"
; value : void* -> "intptr"
; valueSize : DWORD -> "int"
; headerAttributes : DWORD -> "int"
; error : WS_ERROR* optional -> "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 (
	webservices = windows.NewLazySystemDLL("webservices.dll")
	procWsAddCustomHeader = webservices.NewProc("WsAddCustomHeader")
)

// message (WS_MESSAGE*), headerDescription (WS_ELEMENT_DESCRIPTION*), writeOption (WS_WRITE_OPTION), value (void*), valueSize (DWORD), headerAttributes (DWORD), error (WS_ERROR* optional)
r1, _, err := procWsAddCustomHeader.Call(
	uintptr(message),
	uintptr(headerDescription),
	uintptr(writeOption),
	uintptr(value),
	uintptr(valueSize),
	uintptr(headerAttributes),
	uintptr(error),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function WsAddCustomHeader(
  message: Pointer;   // WS_MESSAGE*
  headerDescription: Pointer;   // WS_ELEMENT_DESCRIPTION*
  writeOption: Integer;   // WS_WRITE_OPTION
  value: Pointer;   // void*
  valueSize: DWORD;   // DWORD
  headerAttributes: DWORD;   // DWORD
  error: Pointer   // WS_ERROR* optional
): Integer; stdcall;
  external 'webservices.dll' name 'WsAddCustomHeader';

result := DllCall("webservices\WsAddCustomHeader"
    , "Ptr", message   ; WS_MESSAGE*
    , "Ptr", headerDescription   ; WS_ELEMENT_DESCRIPTION*
    , "Int", writeOption   ; WS_WRITE_OPTION
    , "Ptr", value   ; void*
    , "UInt", valueSize   ; DWORD
    , "UInt", headerAttributes   ; DWORD
    , "Ptr", error   ; WS_ERROR* optional
    , "Int")   ; return: HRESULT

●WsAddCustomHeader(message, headerDescription, writeOption, value, valueSize, headerAttributes, error) = DLL("webservices.dll", "int WsAddCustomHeader(void*, void*, int, void*, dword, dword, void*)")
# 呼び出し: WsAddCustomHeader(message, headerDescription, writeOption, value, valueSize, headerAttributes, error)
# message : WS_MESSAGE* -> "void*"
# headerDescription : WS_ELEMENT_DESCRIPTION* -> "void*"
# writeOption : WS_WRITE_OPTION -> "int"
# value : void* -> "void*"
# valueSize : DWORD -> "dword"
# headerAttributes : DWORD -> "dword"
# error : WS_ERROR* 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)。