SysStringByteLen

関数

BSTR文字列のバイト長を取得する。

DLLOLEAUT32.dll呼出規約winapi

シグネチャ

// OLEAUT32.dll
#include <windows.h>

DWORD SysStringByteLen(
    LPWSTR bstr   // optional
);

パラメーター

名前	型	方向
bstr	LPWSTR	inoptional

戻り値の型: DWORD

各言語での呼び出し定義

// OLEAUT32.dll
#include <windows.h>

DWORD SysStringByteLen(
    LPWSTR bstr   // optional
);

[DllImport("OLEAUT32.dll", ExactSpelling = true)]
static extern uint SysStringByteLen(
    [MarshalAs(UnmanagedType.LPWStr)] string bstr   // LPWSTR optional
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function SysStringByteLen(
    <MarshalAs(UnmanagedType.LPWStr)> bstr As String   ' LPWSTR optional
) As UInteger
End Function

' bstr : LPWSTR optional
Declare PtrSafe Function SysStringByteLen Lib "oleaut32" ( _
    ByVal bstr 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

SysStringByteLen = ctypes.windll.oleaut32.SysStringByteLen
SysStringByteLen.restype = wintypes.DWORD
SysStringByteLen.argtypes = [
    wintypes.LPCWSTR,  # bstr : LPWSTR optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
SysStringByteLen = Fiddle::Function.new(
  lib['SysStringByteLen'],
  [
    Fiddle::TYPE_VOIDP,  # bstr : LPWSTR optional
  ],
  -Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn SysStringByteLen(
        bstr: *mut u16  // LPWSTR optional
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern uint SysStringByteLen([MarshalAs(UnmanagedType.LPWStr)] string bstr);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_SysStringByteLen' -Namespace Win32 -PassThru
# $api::SysStringByteLen(bstr)

#uselib "OLEAUT32.dll"
#func global SysStringByteLen "SysStringByteLen" sptr
; SysStringByteLen bstr   ; 戻り値は stat
; bstr : LPWSTR 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 "OLEAUT32.dll"
#cfunc global SysStringByteLen "SysStringByteLen" wstr
; res = SysStringByteLen(bstr)
; bstr : LPWSTR optional -> "wstr"

; DWORD SysStringByteLen(LPWSTR bstr)
#uselib "OLEAUT32.dll"
#cfunc global SysStringByteLen "SysStringByteLen" wstr
; res = SysStringByteLen(bstr)
; bstr : LPWSTR optional -> "wstr"

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

var (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procSysStringByteLen = oleaut32.NewProc("SysStringByteLen")
)

// bstr (LPWSTR optional)
r1, _, err := procSysStringByteLen.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(bstr))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function SysStringByteLen(
  bstr: PWideChar   // LPWSTR optional
): DWORD; stdcall;
  external 'OLEAUT32.dll' name 'SysStringByteLen';

result := DllCall("OLEAUT32\SysStringByteLen"
    , "WStr", bstr   ; LPWSTR optional
    , "UInt")   ; return: DWORD

●SysStringByteLen(bstr) = DLL("OLEAUT32.dll", "dword SysStringByteLen(char*)")
# 呼び出し: SysStringByteLen(bstr)
# bstr : LPWSTR optional -> "char*"
# 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)。