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SHEnumerateUnreadMailAccountsW

関数

未読メールアカウントを列挙してアドレスを取得する。

DLLSHELL32.dll文字セットUnicode (-W)呼出規約winapi対応OSWindows XP 以降

シグネチャ

// SHELL32.dll  (Unicode / -W)
#include <windows.h>

HRESULT SHEnumerateUnreadMailAccountsW(
    HKEY hKeyUser,   // optional
    DWORD dwIndex,
    LPWSTR pszMailAddress,
    INT cchMailAddress
);

パラメーター

名前	型	方向	説明
hKeyUser	HKEY	inoptional	対象ユーザーのレジストリルートキー(HKEY)。NULLで現在のユーザーを使用する。
dwIndex	DWORD	in	列挙するメールアカウントのインデックス(0始まり)。順に増やして反復する。
pszMailAddress	LPWSTR	out	取得したメールアドレスを受け取る出力バッファ(Unicode)。
cchMailAddress	INT	in	pszMailAddressバッファのサイズ(文字数単位)。

戻り値の型: HRESULT

各言語での呼び出し定義

// SHELL32.dll  (Unicode / -W)
#include <windows.h>

HRESULT SHEnumerateUnreadMailAccountsW(
    HKEY hKeyUser,   // optional
    DWORD dwIndex,
    LPWSTR pszMailAddress,
    INT cchMailAddress
);

[DllImport("SHELL32.dll", CharSet = CharSet.Unicode, ExactSpelling = true)]
static extern int SHEnumerateUnreadMailAccountsW(
    IntPtr hKeyUser,   // HKEY optional
    uint dwIndex,   // DWORD
    [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszMailAddress,   // LPWSTR out
    int cchMailAddress   // INT
);

<DllImport("SHELL32.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function SHEnumerateUnreadMailAccountsW(
    hKeyUser As IntPtr,   ' HKEY optional
    dwIndex As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> pszMailAddress As System.Text.StringBuilder,   ' LPWSTR out
    cchMailAddress As Integer   ' INT
) As Integer
End Function

' hKeyUser : HKEY optional
' dwIndex : DWORD
' pszMailAddress : LPWSTR out
' cchMailAddress : INT
Declare PtrSafe Function SHEnumerateUnreadMailAccountsW Lib "shell32" ( _
    ByVal hKeyUser As LongPtr, _
    ByVal dwIndex As Long, _
    ByVal pszMailAddress As LongPtr, _
    ByVal cchMailAddress As Long) 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

SHEnumerateUnreadMailAccountsW = ctypes.windll.shell32.SHEnumerateUnreadMailAccountsW
SHEnumerateUnreadMailAccountsW.restype = ctypes.c_int
SHEnumerateUnreadMailAccountsW.argtypes = [
    wintypes.HANDLE,  # hKeyUser : HKEY optional
    wintypes.DWORD,  # dwIndex : DWORD
    wintypes.LPWSTR,  # pszMailAddress : LPWSTR out
    ctypes.c_int,  # cchMailAddress : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHELL32.dll')
SHEnumerateUnreadMailAccountsW = Fiddle::Function.new(
  lib['SHEnumerateUnreadMailAccountsW'],
  [
    Fiddle::TYPE_VOIDP,  # hKeyUser : HKEY optional
    -Fiddle::TYPE_INT,  # dwIndex : DWORD
    Fiddle::TYPE_VOIDP,  # pszMailAddress : LPWSTR out
    Fiddle::TYPE_INT,  # cchMailAddress : INT
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "shell32")]
extern "system" {
    fn SHEnumerateUnreadMailAccountsW(
        hKeyUser: *mut core::ffi::c_void,  // HKEY optional
        dwIndex: u32,  // DWORD
        pszMailAddress: *mut u16,  // LPWSTR out
        cchMailAddress: i32  // INT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHELL32.dll", CharSet = CharSet.Unicode)]
public static extern int SHEnumerateUnreadMailAccountsW(IntPtr hKeyUser, uint dwIndex, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszMailAddress, int cchMailAddress);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHELL32_SHEnumerateUnreadMailAccountsW' -Namespace Win32 -PassThru
# $api::SHEnumerateUnreadMailAccountsW(hKeyUser, dwIndex, pszMailAddress, cchMailAddress)

#uselib "SHELL32.dll"
#func global SHEnumerateUnreadMailAccountsW "SHEnumerateUnreadMailAccountsW" wptr, wptr, wptr, wptr
; SHEnumerateUnreadMailAccountsW hKeyUser, dwIndex, varptr(pszMailAddress), cchMailAddress   ; 戻り値は stat
; hKeyUser : HKEY optional -> "wptr"
; dwIndex : DWORD -> "wptr"
; pszMailAddress : LPWSTR out -> "wptr"
; cchMailAddress : INT -> "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。

出力引数:

#uselib "SHELL32.dll"
#cfunc global SHEnumerateUnreadMailAccountsW "SHEnumerateUnreadMailAccountsW" sptr, int, var, int
; res = SHEnumerateUnreadMailAccountsW(hKeyUser, dwIndex, pszMailAddress, cchMailAddress)
; hKeyUser : HKEY optional -> "sptr"
; dwIndex : DWORD -> "int"
; pszMailAddress : LPWSTR out -> "var"
; cchMailAddress : INT -> "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。#uselib "SHELL32.dll"
#cfunc global SHEnumerateUnreadMailAccountsW "SHEnumerateUnreadMailAccountsW" sptr, int, sptr, int
; res = SHEnumerateUnreadMailAccountsW(hKeyUser, dwIndex, varptr(pszMailAddress), cchMailAddress)
; hKeyUser : HKEY optional -> "sptr"
; dwIndex : DWORD -> "int"
; pszMailAddress : LPWSTR out -> "sptr"
; cchMailAddress : INT -> "int"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; HRESULT SHEnumerateUnreadMailAccountsW(HKEY hKeyUser, DWORD dwIndex, LPWSTR pszMailAddress, INT cchMailAddress)
#uselib "SHELL32.dll"
#cfunc global SHEnumerateUnreadMailAccountsW "SHEnumerateUnreadMailAccountsW" intptr, int, var, int
; res = SHEnumerateUnreadMailAccountsW(hKeyUser, dwIndex, pszMailAddress, cchMailAddress)
; hKeyUser : HKEY optional -> "intptr"
; dwIndex : DWORD -> "int"
; pszMailAddress : LPWSTR out -> "var"
; cchMailAddress : INT -> "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 SHEnumerateUnreadMailAccountsW(HKEY hKeyUser, DWORD dwIndex, LPWSTR pszMailAddress, INT cchMailAddress)
#uselib "SHELL32.dll"
#cfunc global SHEnumerateUnreadMailAccountsW "SHEnumerateUnreadMailAccountsW" intptr, int, intptr, int
; res = SHEnumerateUnreadMailAccountsW(hKeyUser, dwIndex, varptr(pszMailAddress), cchMailAddress)
; hKeyUser : HKEY optional -> "intptr"
; dwIndex : DWORD -> "int"
; pszMailAddress : LPWSTR out -> "intptr"
; cchMailAddress : INT -> "int"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

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

var (
	shell32 = windows.NewLazySystemDLL("SHELL32.dll")
	procSHEnumerateUnreadMailAccountsW = shell32.NewProc("SHEnumerateUnreadMailAccountsW")
)

// hKeyUser (HKEY optional), dwIndex (DWORD), pszMailAddress (LPWSTR out), cchMailAddress (INT)
r1, _, err := procSHEnumerateUnreadMailAccountsW.Call(
	uintptr(hKeyUser),
	uintptr(dwIndex),
	uintptr(pszMailAddress),
	uintptr(cchMailAddress),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function SHEnumerateUnreadMailAccountsW(
  hKeyUser: THandle;   // HKEY optional
  dwIndex: DWORD;   // DWORD
  pszMailAddress: PWideChar;   // LPWSTR out
  cchMailAddress: Integer   // INT
): Integer; stdcall;
  external 'SHELL32.dll' name 'SHEnumerateUnreadMailAccountsW';

result := DllCall("SHELL32\SHEnumerateUnreadMailAccountsW"
    , "Ptr", hKeyUser   ; HKEY optional
    , "UInt", dwIndex   ; DWORD
    , "Ptr", pszMailAddress   ; LPWSTR out
    , "Int", cchMailAddress   ; INT
    , "Int")   ; return: HRESULT

●SHEnumerateUnreadMailAccountsW(hKeyUser, dwIndex, pszMailAddress, cchMailAddress) = DLL("SHELL32.dll", "int SHEnumerateUnreadMailAccountsW(void*, dword, char*, int)")
# 呼び出し: SHEnumerateUnreadMailAccountsW(hKeyUser, dwIndex, pszMailAddress, cchMailAddress)
# hKeyUser : HKEY optional -> "void*"
# dwIndex : DWORD -> "dword"
# pszMailAddress : LPWSTR out -> "char*"
# cchMailAddress : INT -> "int"
# 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。