VarI4FromUI4

関数

DWORD値をINT（符号付き4バイト整数）に変換する。

DLLOLEAUT32.dll呼出規約winapi

シグネチャ

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

HRESULT VarI4FromUI4(
    DWORD ulIn,
    INT* plOut
);

パラメーター

名前	型	方向
ulIn	DWORD	in
plOut	INT*	out

戻り値の型: HRESULT

各言語での呼び出し定義

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

HRESULT VarI4FromUI4(
    DWORD ulIn,
    INT* plOut
);

[DllImport("OLEAUT32.dll", ExactSpelling = true)]
static extern int VarI4FromUI4(
    uint ulIn,   // DWORD
    out int plOut   // INT* out
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VarI4FromUI4(
    ulIn As UInteger,   ' DWORD
    <Out> ByRef plOut As Integer   ' INT* out
) As Integer
End Function

' ulIn : DWORD
' plOut : INT* out
Declare PtrSafe Function VarI4FromUI4 Lib "oleaut32" ( _
    ByVal ulIn As Long, _
    ByRef plOut As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

VarI4FromUI4 = ctypes.windll.oleaut32.VarI4FromUI4
VarI4FromUI4.restype = ctypes.c_int
VarI4FromUI4.argtypes = [
    wintypes.DWORD,  # ulIn : DWORD
    ctypes.POINTER(ctypes.c_int),  # plOut : INT* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VarI4FromUI4 = Fiddle::Function.new(
  lib['VarI4FromUI4'],
  [
    -Fiddle::TYPE_INT,  # ulIn : DWORD
    Fiddle::TYPE_VOIDP,  # plOut : INT* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VarI4FromUI4(
        ulIn: u32,  // DWORD
        plOut: *mut i32  // INT* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VarI4FromUI4(uint ulIn, out int plOut);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarI4FromUI4' -Namespace Win32 -PassThru
# $api::VarI4FromUI4(ulIn, plOut)

#uselib "OLEAUT32.dll"
#func global VarI4FromUI4 "VarI4FromUI4" sptr, sptr
; VarI4FromUI4 ulIn, varptr(plOut)   ; 戻り値は stat
; ulIn : DWORD -> "sptr"
; plOut : INT* 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。

出力引数:

#uselib "OLEAUT32.dll"
#cfunc global VarI4FromUI4 "VarI4FromUI4" int, var
; res = VarI4FromUI4(ulIn, plOut)
; ulIn : DWORD -> "int"
; plOut : INT* 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。#uselib "OLEAUT32.dll"
#cfunc global VarI4FromUI4 "VarI4FromUI4" int, sptr
; res = VarI4FromUI4(ulIn, varptr(plOut))
; ulIn : DWORD -> "int"
; plOut : INT* out -> "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:

; HRESULT VarI4FromUI4(DWORD ulIn, INT* plOut)
#uselib "OLEAUT32.dll"
#cfunc global VarI4FromUI4 "VarI4FromUI4" int, var
; res = VarI4FromUI4(ulIn, plOut)
; ulIn : DWORD -> "int"
; plOut : INT* 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。; HRESULT VarI4FromUI4(DWORD ulIn, INT* plOut)
#uselib "OLEAUT32.dll"
#cfunc global VarI4FromUI4 "VarI4FromUI4" int, intptr
; res = VarI4FromUI4(ulIn, varptr(plOut))
; ulIn : DWORD -> "int"
; plOut : INT* out -> "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 (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procVarI4FromUI4 = oleaut32.NewProc("VarI4FromUI4")
)

// ulIn (DWORD), plOut (INT* out)
r1, _, err := procVarI4FromUI4.Call(
	uintptr(ulIn),
	uintptr(plOut),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function VarI4FromUI4(
  ulIn: DWORD;   // DWORD
  plOut: Pointer   // INT* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarI4FromUI4';

result := DllCall("OLEAUT32\VarI4FromUI4"
    , "UInt", ulIn   ; DWORD
    , "Ptr", plOut   ; INT* out
    , "Int")   ; return: HRESULT

●VarI4FromUI4(ulIn, plOut) = DLL("OLEAUT32.dll", "int VarI4FromUI4(dword, void*)")
# 呼び出し: VarI4FromUI4(ulIn, plOut)
# ulIn : DWORD -> "dword"
# plOut : INT* 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)。