CryptMsgGetParam

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

BOOL CryptMsgGetParam(
    void* hCryptMsg,
    DWORD dwParamType,
    DWORD dwIndex,
    void* pvData,   // optional
    DWORD* pcbData
);

<DllImport("CRYPT32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function CryptMsgGetParam(
    hCryptMsg As IntPtr,   ' void*
    dwParamType As UInteger,   ' DWORD
    dwIndex As UInteger,   ' DWORD
    pvData As IntPtr,   ' void* optional, out
    ByRef pcbData As UInteger   ' DWORD* in/out
) As Boolean
End Function

' hCryptMsg : void*
' dwParamType : DWORD
' dwIndex : DWORD
' pvData : void* optional, out
' pcbData : DWORD* in/out
Declare PtrSafe Function CryptMsgGetParam Lib "crypt32" ( _
    ByVal hCryptMsg As LongPtr, _
    ByVal dwParamType As Long, _
    ByVal dwIndex As Long, _
    ByVal pvData As LongPtr, _
    ByRef pcbData 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

CryptMsgGetParam = ctypes.windll.crypt32.CryptMsgGetParam
CryptMsgGetParam.restype = wintypes.BOOL
CryptMsgGetParam.argtypes = [
    ctypes.POINTER(None),  # hCryptMsg : void*
    wintypes.DWORD,  # dwParamType : DWORD
    wintypes.DWORD,  # dwIndex : DWORD
    ctypes.POINTER(None),  # pvData : void* optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcbData : DWORD* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('CRYPT32.dll')
CryptMsgGetParam = Fiddle::Function.new(
  lib['CryptMsgGetParam'],
  [
    Fiddle::TYPE_VOIDP,  # hCryptMsg : void*
    -Fiddle::TYPE_INT,  # dwParamType : DWORD
    -Fiddle::TYPE_INT,  # dwIndex : DWORD
    Fiddle::TYPE_VOIDP,  # pvData : void* optional, out
    Fiddle::TYPE_VOIDP,  # pcbData : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "crypt32")]
extern "system" {
    fn CryptMsgGetParam(
        hCryptMsg: *mut (),  // void*
        dwParamType: u32,  // DWORD
        dwIndex: u32,  // DWORD
        pvData: *mut (),  // void* optional, out
        pcbData: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("CRYPT32.dll", SetLastError = true)]
public static extern bool CryptMsgGetParam(IntPtr hCryptMsg, uint dwParamType, uint dwIndex, IntPtr pvData, ref uint pcbData);
"@
$api = Add-Type -MemberDefinition $sig -Name 'CRYPT32_CryptMsgGetParam' -Namespace Win32 -PassThru
# $api::CryptMsgGetParam(hCryptMsg, dwParamType, dwIndex, pvData, pcbData)

#uselib "CRYPT32.dll"
#func global CryptMsgGetParam "CryptMsgGetParam" sptr, sptr, sptr, sptr, sptr
; CryptMsgGetParam hCryptMsg, dwParamType, dwIndex, pvData, varptr(pcbData)   ; 戻り値は stat
; hCryptMsg : void* -> "sptr"
; dwParamType : DWORD -> "sptr"
; dwIndex : DWORD -> "sptr"
; pvData : void* optional, out -> "sptr"
; pcbData : DWORD* in/out -> "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 CryptMsgGetParam "CryptMsgGetParam" sptr, int, int, sptr, var
; res = CryptMsgGetParam(hCryptMsg, dwParamType, dwIndex, pvData, pcbData)
; hCryptMsg : void* -> "sptr"
; dwParamType : DWORD -> "int"
; dwIndex : DWORD -> "int"
; pvData : void* optional, out -> "sptr"
; pcbData : DWORD* in/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 CryptMsgGetParam(void* hCryptMsg, DWORD dwParamType, DWORD dwIndex, void* pvData, DWORD* pcbData)
#uselib "CRYPT32.dll"
#cfunc global CryptMsgGetParam "CryptMsgGetParam" intptr, int, int, intptr, var
; res = CryptMsgGetParam(hCryptMsg, dwParamType, dwIndex, pvData, pcbData)
; hCryptMsg : void* -> "intptr"
; dwParamType : DWORD -> "int"
; dwIndex : DWORD -> "int"
; pvData : void* optional, out -> "intptr"
; pcbData : DWORD* in/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 (
	crypt32 = windows.NewLazySystemDLL("CRYPT32.dll")
	procCryptMsgGetParam = crypt32.NewProc("CryptMsgGetParam")
)

// hCryptMsg (void*), dwParamType (DWORD), dwIndex (DWORD), pvData (void* optional, out), pcbData (DWORD* in/out)
r1, _, err := procCryptMsgGetParam.Call(
	uintptr(hCryptMsg),
	uintptr(dwParamType),
	uintptr(dwIndex),
	uintptr(pvData),
	uintptr(pcbData),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CryptMsgGetParam(
  hCryptMsg: Pointer;   // void*
  dwParamType: DWORD;   // DWORD
  dwIndex: DWORD;   // DWORD
  pvData: Pointer;   // void* optional, out
  pcbData: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'CRYPT32.dll' name 'CryptMsgGetParam';

result := DllCall("CRYPT32\CryptMsgGetParam"
    , "Ptr", hCryptMsg   ; void*
    , "UInt", dwParamType   ; DWORD
    , "UInt", dwIndex   ; DWORD
    , "Ptr", pvData   ; void* optional, out
    , "Ptr", pcbData   ; DWORD* in/out
    , "Int")   ; return: BOOL

●CryptMsgGetParam(hCryptMsg, dwParamType, dwIndex, pvData, pcbData) = DLL("CRYPT32.dll", "bool CryptMsgGetParam(void*, dword, dword, void*, void*)")
# 呼び出し: CryptMsgGetParam(hCryptMsg, dwParamType, dwIndex, pvData, pcbData)
# hCryptMsg : void* -> "void*"
# dwParamType : DWORD -> "dword"
# dwIndex : DWORD -> "dword"
# pvData : void* optional, out -> "void*"
# pcbData : DWORD* in/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)。