ホーム › System.Com.StructuredStorage › PropVariantToStringWithDefault

PropVariantToStringWithDefault

関数

PROPVARIANTを文字列へ変換し失敗時は既定値を返す。

DLLPROPSYS.dll呼出規約winapi対応OSWindows XP 以降

シグネチャ

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

LPWSTR PropVariantToStringWithDefault(
    const PROPVARIANT* propvarIn,
    LPCWSTR pszDefault   // optional
);

パラメーター

名前	型	方向
propvarIn	PROPVARIANT*	in
pszDefault	LPCWSTR	inoptional

戻り値の型: LPWSTR

各言語での呼び出し定義

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

LPWSTR PropVariantToStringWithDefault(
    const PROPVARIANT* propvarIn,
    LPCWSTR pszDefault   // optional
);

[DllImport("PROPSYS.dll", ExactSpelling = true)]
static extern IntPtr PropVariantToStringWithDefault(
    IntPtr propvarIn,   // PROPVARIANT*
    [MarshalAs(UnmanagedType.LPWStr)] string pszDefault   // LPCWSTR optional
);

<DllImport("PROPSYS.dll", ExactSpelling:=True)>
Public Shared Function PropVariantToStringWithDefault(
    propvarIn As IntPtr,   ' PROPVARIANT*
    <MarshalAs(UnmanagedType.LPWStr)> pszDefault As String   ' LPCWSTR optional
) As IntPtr
End Function

' propvarIn : PROPVARIANT*
' pszDefault : LPCWSTR optional
Declare PtrSafe Function PropVariantToStringWithDefault Lib "propsys" ( _
    ByVal propvarIn As LongPtr, _
    ByVal pszDefault As LongPtr) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

PropVariantToStringWithDefault = ctypes.windll.propsys.PropVariantToStringWithDefault
PropVariantToStringWithDefault.restype = wintypes.LPWSTR
PropVariantToStringWithDefault.argtypes = [
    ctypes.c_void_p,  # propvarIn : PROPVARIANT*
    wintypes.LPCWSTR,  # pszDefault : LPCWSTR optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('PROPSYS.dll')
PropVariantToStringWithDefault = Fiddle::Function.new(
  lib['PropVariantToStringWithDefault'],
  [
    Fiddle::TYPE_VOIDP,  # propvarIn : PROPVARIANT*
    Fiddle::TYPE_VOIDP,  # pszDefault : LPCWSTR optional
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "propsys")]
extern "system" {
    fn PropVariantToStringWithDefault(
        propvarIn: *const PROPVARIANT,  // PROPVARIANT*
        pszDefault: *const u16  // LPCWSTR optional
    ) -> *mut u16;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("PROPSYS.dll")]
public static extern IntPtr PropVariantToStringWithDefault(IntPtr propvarIn, [MarshalAs(UnmanagedType.LPWStr)] string pszDefault);
"@
$api = Add-Type -MemberDefinition $sig -Name 'PROPSYS_PropVariantToStringWithDefault' -Namespace Win32 -PassThru
# $api::PropVariantToStringWithDefault(propvarIn, pszDefault)

#uselib "PROPSYS.dll"
#func global PropVariantToStringWithDefault "PropVariantToStringWithDefault" sptr, sptr
; PropVariantToStringWithDefault varptr(propvarIn), pszDefault   ; 戻り値は stat
; propvarIn : PROPVARIANT* -> "sptr"
; pszDefault : LPCWSTR 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。

出力引数:

#uselib "PROPSYS.dll"
#cfunc global PropVariantToStringWithDefault "PropVariantToStringWithDefault" var, wstr
; res = PropVariantToStringWithDefault(propvarIn, pszDefault)
; propvarIn : PROPVARIANT* -> "var"
; pszDefault : LPCWSTR optional -> "wstr"
; ※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 "PROPSYS.dll"
#cfunc global PropVariantToStringWithDefault "PropVariantToStringWithDefault" sptr, wstr
; res = PropVariantToStringWithDefault(varptr(propvarIn), pszDefault)
; propvarIn : PROPVARIANT* -> "sptr"
; pszDefault : LPCWSTR optional -> "wstr"
; ※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:

; LPWSTR PropVariantToStringWithDefault(PROPVARIANT* propvarIn, LPCWSTR pszDefault)
#uselib "PROPSYS.dll"
#cfunc global PropVariantToStringWithDefault "PropVariantToStringWithDefault" var, wstr
; res = PropVariantToStringWithDefault(propvarIn, pszDefault)
; propvarIn : PROPVARIANT* -> "var"
; pszDefault : LPCWSTR optional -> "wstr"
; ※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。; LPWSTR PropVariantToStringWithDefault(PROPVARIANT* propvarIn, LPCWSTR pszDefault)
#uselib "PROPSYS.dll"
#cfunc global PropVariantToStringWithDefault "PropVariantToStringWithDefault" intptr, wstr
; res = PropVariantToStringWithDefault(varptr(propvarIn), pszDefault)
; propvarIn : PROPVARIANT* -> "intptr"
; pszDefault : LPCWSTR optional -> "wstr"
; ※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 (
	propsys = windows.NewLazySystemDLL("PROPSYS.dll")
	procPropVariantToStringWithDefault = propsys.NewProc("PropVariantToStringWithDefault")
)

// propvarIn (PROPVARIANT*), pszDefault (LPCWSTR optional)
r1, _, err := procPropVariantToStringWithDefault.Call(
	uintptr(propvarIn),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszDefault))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // LPWSTR

function PropVariantToStringWithDefault(
  propvarIn: Pointer;   // PROPVARIANT*
  pszDefault: PWideChar   // LPCWSTR optional
): PWideChar; stdcall;
  external 'PROPSYS.dll' name 'PropVariantToStringWithDefault';

result := DllCall("PROPSYS\PropVariantToStringWithDefault"
    , "Ptr", propvarIn   ; PROPVARIANT*
    , "WStr", pszDefault   ; LPCWSTR optional
    , "Ptr")   ; return: LPWSTR

●PropVariantToStringWithDefault(propvarIn, pszDefault) = DLL("PROPSYS.dll", "char* PropVariantToStringWithDefault(void*, char*)")
# 呼び出し: PropVariantToStringWithDefault(propvarIn, pszDefault)
# propvarIn : PROPVARIANT* -> "void*"
# pszDefault : LPCWSTR 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)。