ScCreateConversationIndex

// MAPI32.dll
#include <windows.h>

INT ScCreateConversationIndex(
    DWORD cbParent,
    BYTE* lpbParent,
    DWORD* lpcbConvIndex,
    BYTE** lppbConvIndex
);

<DllImport("MAPI32.dll", ExactSpelling:=True)>
Public Shared Function ScCreateConversationIndex(
    cbParent As UInteger,   ' DWORD
    lpbParent As IntPtr,   ' BYTE* in/out
    ByRef lpcbConvIndex As UInteger,   ' DWORD* in/out
    lppbConvIndex As IntPtr   ' BYTE** in/out
) As Integer
End Function

' cbParent : DWORD
' lpbParent : BYTE* in/out
' lpcbConvIndex : DWORD* in/out
' lppbConvIndex : BYTE** in/out
Declare PtrSafe Function ScCreateConversationIndex Lib "mapi32" ( _
    ByVal cbParent As Long, _
    ByVal lpbParent As LongPtr, _
    ByRef lpcbConvIndex As Long, _
    ByVal lppbConvIndex 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

ScCreateConversationIndex = ctypes.windll.mapi32.ScCreateConversationIndex
ScCreateConversationIndex.restype = ctypes.c_int
ScCreateConversationIndex.argtypes = [
    wintypes.DWORD,  # cbParent : DWORD
    ctypes.POINTER(ctypes.c_ubyte),  # lpbParent : BYTE* in/out
    ctypes.POINTER(wintypes.DWORD),  # lpcbConvIndex : DWORD* in/out
    ctypes.c_void_p,  # lppbConvIndex : BYTE** in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MAPI32.dll')
ScCreateConversationIndex = Fiddle::Function.new(
  lib['ScCreateConversationIndex'],
  [
    -Fiddle::TYPE_INT,  # cbParent : DWORD
    Fiddle::TYPE_VOIDP,  # lpbParent : BYTE* in/out
    Fiddle::TYPE_VOIDP,  # lpcbConvIndex : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # lppbConvIndex : BYTE** in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "mapi32")]
extern "system" {
    fn ScCreateConversationIndex(
        cbParent: u32,  // DWORD
        lpbParent: *mut u8,  // BYTE* in/out
        lpcbConvIndex: *mut u32,  // DWORD* in/out
        lppbConvIndex: *mut *mut u8  // BYTE** in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MAPI32.dll")]
public static extern int ScCreateConversationIndex(uint cbParent, IntPtr lpbParent, ref uint lpcbConvIndex, IntPtr lppbConvIndex);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MAPI32_ScCreateConversationIndex' -Namespace Win32 -PassThru
# $api::ScCreateConversationIndex(cbParent, lpbParent, lpcbConvIndex, lppbConvIndex)

#uselib "MAPI32.dll"
#func global ScCreateConversationIndex "ScCreateConversationIndex" sptr, sptr, sptr, sptr
; ScCreateConversationIndex cbParent, varptr(lpbParent), varptr(lpcbConvIndex), varptr(lppbConvIndex)   ; 戻り値は stat
; cbParent : DWORD -> "sptr"
; lpbParent : BYTE* in/out -> "sptr"
; lpcbConvIndex : DWORD* in/out -> "sptr"
; lppbConvIndex : BYTE** 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 "MAPI32.dll"
#cfunc global ScCreateConversationIndex "ScCreateConversationIndex" int, var, var, var
; res = ScCreateConversationIndex(cbParent, lpbParent, lpcbConvIndex, lppbConvIndex)
; cbParent : DWORD -> "int"
; lpbParent : BYTE* in/out -> "var"
; lpcbConvIndex : DWORD* in/out -> "var"
; lppbConvIndex : BYTE** 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。

; INT ScCreateConversationIndex(DWORD cbParent, BYTE* lpbParent, DWORD* lpcbConvIndex, BYTE** lppbConvIndex)
#uselib "MAPI32.dll"
#cfunc global ScCreateConversationIndex "ScCreateConversationIndex" int, var, var, var
; res = ScCreateConversationIndex(cbParent, lpbParent, lpcbConvIndex, lppbConvIndex)
; cbParent : DWORD -> "int"
; lpbParent : BYTE* in/out -> "var"
; lpcbConvIndex : DWORD* in/out -> "var"
; lppbConvIndex : BYTE** 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 (
	mapi32 = windows.NewLazySystemDLL("MAPI32.dll")
	procScCreateConversationIndex = mapi32.NewProc("ScCreateConversationIndex")
)

// cbParent (DWORD), lpbParent (BYTE* in/out), lpcbConvIndex (DWORD* in/out), lppbConvIndex (BYTE** in/out)
r1, _, err := procScCreateConversationIndex.Call(
	uintptr(cbParent),
	uintptr(lpbParent),
	uintptr(lpcbConvIndex),
	uintptr(lppbConvIndex),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function ScCreateConversationIndex(
  cbParent: DWORD;   // DWORD
  lpbParent: Pointer;   // BYTE* in/out
  lpcbConvIndex: Pointer;   // DWORD* in/out
  lppbConvIndex: Pointer   // BYTE** in/out
): Integer; stdcall;
  external 'MAPI32.dll' name 'ScCreateConversationIndex';

result := DllCall("MAPI32\ScCreateConversationIndex"
    , "UInt", cbParent   ; DWORD
    , "Ptr", lpbParent   ; BYTE* in/out
    , "Ptr", lpcbConvIndex   ; DWORD* in/out
    , "Ptr", lppbConvIndex   ; BYTE** in/out
    , "Int")   ; return: INT

●ScCreateConversationIndex(cbParent, lpbParent, lpcbConvIndex, lppbConvIndex) = DLL("MAPI32.dll", "int ScCreateConversationIndex(dword, void*, void*, void*)")
# 呼び出し: ScCreateConversationIndex(cbParent, lpbParent, lpcbConvIndex, lppbConvIndex)
# cbParent : DWORD -> "dword"
# lpbParent : BYTE* in/out -> "void*"
# lpcbConvIndex : DWORD* in/out -> "void*"
# lppbConvIndex : BYTE** 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)。