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PropVariantGetElementCount

関数

ベクター型または配列型PROPVARIANTの要素数を取得する。

DLLPROPSYS.dll呼出規約winapi対応OSWindows XP 以降

シグネチャ

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

DWORD PropVariantGetElementCount(
    const PROPVARIANT* propvar
);

パラメーター

名前	型	方向
propvar	PROPVARIANT*	in

戻り値の型: DWORD

各言語での呼び出し定義

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

DWORD PropVariantGetElementCount(
    const PROPVARIANT* propvar
);

[DllImport("PROPSYS.dll", ExactSpelling = true)]
static extern uint PropVariantGetElementCount(
    IntPtr propvar   // PROPVARIANT*
);

<DllImport("PROPSYS.dll", ExactSpelling:=True)>
Public Shared Function PropVariantGetElementCount(
    propvar As IntPtr   ' PROPVARIANT*
) As UInteger
End Function

' propvar : PROPVARIANT*
Declare PtrSafe Function PropVariantGetElementCount Lib "propsys" ( _
    ByVal propvar 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

PropVariantGetElementCount = ctypes.windll.propsys.PropVariantGetElementCount
PropVariantGetElementCount.restype = wintypes.DWORD
PropVariantGetElementCount.argtypes = [
    ctypes.c_void_p,  # propvar : PROPVARIANT*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('PROPSYS.dll')
PropVariantGetElementCount = Fiddle::Function.new(
  lib['PropVariantGetElementCount'],
  [
    Fiddle::TYPE_VOIDP,  # propvar : PROPVARIANT*
  ],
  -Fiddle::TYPE_INT)

#[link(name = "propsys")]
extern "system" {
    fn PropVariantGetElementCount(
        propvar: *const PROPVARIANT  // PROPVARIANT*
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("PROPSYS.dll")]
public static extern uint PropVariantGetElementCount(IntPtr propvar);
"@
$api = Add-Type -MemberDefinition $sig -Name 'PROPSYS_PropVariantGetElementCount' -Namespace Win32 -PassThru
# $api::PropVariantGetElementCount(propvar)

#uselib "PROPSYS.dll"
#func global PropVariantGetElementCount "PropVariantGetElementCount" sptr
; PropVariantGetElementCount varptr(propvar)   ; 戻り値は stat
; propvar : PROPVARIANT* -> "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 PropVariantGetElementCount "PropVariantGetElementCount" var
; res = PropVariantGetElementCount(propvar)
; propvar : PROPVARIANT* -> "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。#uselib "PROPSYS.dll"
#cfunc global PropVariantGetElementCount "PropVariantGetElementCount" sptr
; res = PropVariantGetElementCount(varptr(propvar))
; propvar : PROPVARIANT* -> "sptr"
; ※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:

; DWORD PropVariantGetElementCount(PROPVARIANT* propvar)
#uselib "PROPSYS.dll"
#cfunc global PropVariantGetElementCount "PropVariantGetElementCount" var
; res = PropVariantGetElementCount(propvar)
; propvar : PROPVARIANT* -> "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。; DWORD PropVariantGetElementCount(PROPVARIANT* propvar)
#uselib "PROPSYS.dll"
#cfunc global PropVariantGetElementCount "PropVariantGetElementCount" intptr
; res = PropVariantGetElementCount(varptr(propvar))
; propvar : PROPVARIANT* -> "intptr"
; ※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")
	procPropVariantGetElementCount = propsys.NewProc("PropVariantGetElementCount")
)

// propvar (PROPVARIANT*)
r1, _, err := procPropVariantGetElementCount.Call(
	uintptr(propvar),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PropVariantGetElementCount(
  propvar: Pointer   // PROPVARIANT*
): DWORD; stdcall;
  external 'PROPSYS.dll' name 'PropVariantGetElementCount';

result := DllCall("PROPSYS\PropVariantGetElementCount"
    , "Ptr", propvar   ; PROPVARIANT*
    , "UInt")   ; return: DWORD

●PropVariantGetElementCount(propvar) = DLL("PROPSYS.dll", "dword PropVariantGetElementCount(void*)")
# 呼び出し: PropVariantGetElementCount(propvar)
# propvar : PROPVARIANT* -> "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)。