CryptMsgCalculateEncodedLength

// CRYPT32.dll
#include <windows.h>

DWORD CryptMsgCalculateEncodedLength(
    DWORD dwMsgEncodingType,
    DWORD dwFlags,
    DWORD dwMsgType,
    const void* pvMsgEncodeInfo,
    LPSTR pszInnerContentObjID,   // optional
    DWORD cbData
);

<DllImport("CRYPT32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CryptMsgCalculateEncodedLength(
    dwMsgEncodingType As UInteger,   ' DWORD
    dwFlags As UInteger,   ' DWORD
    dwMsgType As UInteger,   ' DWORD
    pvMsgEncodeInfo As IntPtr,   ' void*
    <MarshalAs(UnmanagedType.LPStr)> pszInnerContentObjID As String,   ' LPSTR optional
    cbData As UInteger   ' DWORD
) As UInteger
End Function

' dwMsgEncodingType : DWORD
' dwFlags : DWORD
' dwMsgType : DWORD
' pvMsgEncodeInfo : void*
' pszInnerContentObjID : LPSTR optional
' cbData : DWORD
Declare PtrSafe Function CryptMsgCalculateEncodedLength Lib "crypt32" ( _
    ByVal dwMsgEncodingType As Long, _
    ByVal dwFlags As Long, _
    ByVal dwMsgType As Long, _
    ByVal pvMsgEncodeInfo As LongPtr, _
    ByVal pszInnerContentObjID As String, _
    ByVal cbData 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

CryptMsgCalculateEncodedLength = ctypes.windll.crypt32.CryptMsgCalculateEncodedLength
CryptMsgCalculateEncodedLength.restype = wintypes.DWORD
CryptMsgCalculateEncodedLength.argtypes = [
    wintypes.DWORD,  # dwMsgEncodingType : DWORD
    wintypes.DWORD,  # dwFlags : DWORD
    wintypes.DWORD,  # dwMsgType : DWORD
    ctypes.POINTER(None),  # pvMsgEncodeInfo : void*
    wintypes.LPCSTR,  # pszInnerContentObjID : LPSTR optional
    wintypes.DWORD,  # cbData : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CRYPT32.dll')
CryptMsgCalculateEncodedLength = Fiddle::Function.new(
  lib['CryptMsgCalculateEncodedLength'],
  [
    -Fiddle::TYPE_INT,  # dwMsgEncodingType : DWORD
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
    -Fiddle::TYPE_INT,  # dwMsgType : DWORD
    Fiddle::TYPE_VOIDP,  # pvMsgEncodeInfo : void*
    Fiddle::TYPE_VOIDP,  # pszInnerContentObjID : LPSTR optional
    -Fiddle::TYPE_INT,  # cbData : DWORD
  ],
  -Fiddle::TYPE_INT)

#[link(name = "crypt32")]
extern "system" {
    fn CryptMsgCalculateEncodedLength(
        dwMsgEncodingType: u32,  // DWORD
        dwFlags: u32,  // DWORD
        dwMsgType: u32,  // DWORD
        pvMsgEncodeInfo: *const (),  // void*
        pszInnerContentObjID: *mut u8,  // LPSTR optional
        cbData: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("CRYPT32.dll", SetLastError = true)]
public static extern uint CryptMsgCalculateEncodedLength(uint dwMsgEncodingType, uint dwFlags, uint dwMsgType, IntPtr pvMsgEncodeInfo, [MarshalAs(UnmanagedType.LPStr)] string pszInnerContentObjID, uint cbData);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CRYPT32_CryptMsgCalculateEncodedLength' -Namespace Win32 -PassThru
# $api::CryptMsgCalculateEncodedLength(dwMsgEncodingType, dwFlags, dwMsgType, pvMsgEncodeInfo, pszInnerContentObjID, cbData)

#uselib "CRYPT32.dll"
#func global CryptMsgCalculateEncodedLength "CryptMsgCalculateEncodedLength" sptr, sptr, sptr, sptr, sptr, sptr
; CryptMsgCalculateEncodedLength dwMsgEncodingType, dwFlags, dwMsgType, pvMsgEncodeInfo, pszInnerContentObjID, cbData   ; 戻り値は stat
; dwMsgEncodingType : DWORD -> "sptr"
; dwFlags : DWORD -> "sptr"
; dwMsgType : DWORD -> "sptr"
; pvMsgEncodeInfo : void* -> "sptr"
; pszInnerContentObjID : LPSTR optional -> "sptr"
; cbData : 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 "CRYPT32.dll"
#cfunc global CryptMsgCalculateEncodedLength "CryptMsgCalculateEncodedLength" int, int, int, sptr, str, int
; res = CryptMsgCalculateEncodedLength(dwMsgEncodingType, dwFlags, dwMsgType, pvMsgEncodeInfo, pszInnerContentObjID, cbData)
; dwMsgEncodingType : DWORD -> "int"
; dwFlags : DWORD -> "int"
; dwMsgType : DWORD -> "int"
; pvMsgEncodeInfo : void* -> "sptr"
; pszInnerContentObjID : LPSTR optional -> "str"
; cbData : DWORD -> "int"

; DWORD CryptMsgCalculateEncodedLength(DWORD dwMsgEncodingType, DWORD dwFlags, DWORD dwMsgType, void* pvMsgEncodeInfo, LPSTR pszInnerContentObjID, DWORD cbData)
#uselib "CRYPT32.dll"
#cfunc global CryptMsgCalculateEncodedLength "CryptMsgCalculateEncodedLength" int, int, int, intptr, str, int
; res = CryptMsgCalculateEncodedLength(dwMsgEncodingType, dwFlags, dwMsgType, pvMsgEncodeInfo, pszInnerContentObjID, cbData)
; dwMsgEncodingType : DWORD -> "int"
; dwFlags : DWORD -> "int"
; dwMsgType : DWORD -> "int"
; pvMsgEncodeInfo : void* -> "intptr"
; pszInnerContentObjID : LPSTR optional -> "str"
; cbData : DWORD -> "int"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	crypt32 = windows.NewLazySystemDLL("CRYPT32.dll")
	procCryptMsgCalculateEncodedLength = crypt32.NewProc("CryptMsgCalculateEncodedLength")
)

// dwMsgEncodingType (DWORD), dwFlags (DWORD), dwMsgType (DWORD), pvMsgEncodeInfo (void*), pszInnerContentObjID (LPSTR optional), cbData (DWORD)
r1, _, err := procCryptMsgCalculateEncodedLength.Call(
	uintptr(dwMsgEncodingType),
	uintptr(dwFlags),
	uintptr(dwMsgType),
	uintptr(pvMsgEncodeInfo),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pszInnerContentObjID))),
	uintptr(cbData),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function CryptMsgCalculateEncodedLength(
  dwMsgEncodingType: DWORD;   // DWORD
  dwFlags: DWORD;   // DWORD
  dwMsgType: DWORD;   // DWORD
  pvMsgEncodeInfo: Pointer;   // void*
  pszInnerContentObjID: PAnsiChar;   // LPSTR optional
  cbData: DWORD   // DWORD
): DWORD; stdcall;
  external 'CRYPT32.dll' name 'CryptMsgCalculateEncodedLength';

result := DllCall("CRYPT32\CryptMsgCalculateEncodedLength"
    , "UInt", dwMsgEncodingType   ; DWORD
    , "UInt", dwFlags   ; DWORD
    , "UInt", dwMsgType   ; DWORD
    , "Ptr", pvMsgEncodeInfo   ; void*
    , "AStr", pszInnerContentObjID   ; LPSTR optional
    , "UInt", cbData   ; DWORD
    , "UInt")   ; return: DWORD

●CryptMsgCalculateEncodedLength(dwMsgEncodingType, dwFlags, dwMsgType, pvMsgEncodeInfo, pszInnerContentObjID, cbData) = DLL("CRYPT32.dll", "dword CryptMsgCalculateEncodedLength(dword, dword, dword, void*, char*, dword)")
# 呼び出し: CryptMsgCalculateEncodedLength(dwMsgEncodingType, dwFlags, dwMsgType, pvMsgEncodeInfo, pszInnerContentObjID, cbData)
# dwMsgEncodingType : DWORD -> "dword"
# dwFlags : DWORD -> "dword"
# dwMsgType : DWORD -> "dword"
# pvMsgEncodeInfo : void* -> "void*"
# pszInnerContentObjID : LPSTR optional -> "char*"
# cbData : 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)。