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QueryActCtxW

関数

アクティベーションコンテキストの情報を問い合わせて取得する。

DLLKERNEL32.dll呼出規約winapiSetLastErrorあり対応OSWindows XP 以降

シグネチャ

// KERNEL32.dll
#include <windows.h>

BOOL QueryActCtxW(
    DWORD dwFlags,
    HANDLE hActCtx,
    void* pvSubInstance,   // optional
    DWORD ulInfoClass,
    void* pvBuffer,   // optional
    UINT_PTR cbBuffer,
    UINT_PTR* pcbWrittenOrRequired   // optional
);

パラメーター

名前	型	方向
dwFlags	DWORD	in
hActCtx	HANDLE	in
pvSubInstance	void*	inoptional
ulInfoClass	DWORD	in
pvBuffer	void*	outoptional
cbBuffer	UINT_PTR	in
pcbWrittenOrRequired	UINT_PTR*	outoptional

戻り値の型: BOOL

各言語での呼び出し定義

// KERNEL32.dll
#include <windows.h>

BOOL QueryActCtxW(
    DWORD dwFlags,
    HANDLE hActCtx,
    void* pvSubInstance,   // optional
    DWORD ulInfoClass,
    void* pvBuffer,   // optional
    UINT_PTR cbBuffer,
    UINT_PTR* pcbWrittenOrRequired   // optional
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool QueryActCtxW(
    uint dwFlags,   // DWORD
    IntPtr hActCtx,   // HANDLE
    IntPtr pvSubInstance,   // void* optional
    uint ulInfoClass,   // DWORD
    IntPtr pvBuffer,   // void* optional, out
    UIntPtr cbBuffer,   // UINT_PTR
    IntPtr pcbWrittenOrRequired   // UINT_PTR* optional, out
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function QueryActCtxW(
    dwFlags As UInteger,   ' DWORD
    hActCtx As IntPtr,   ' HANDLE
    pvSubInstance As IntPtr,   ' void* optional
    ulInfoClass As UInteger,   ' DWORD
    pvBuffer As IntPtr,   ' void* optional, out
    cbBuffer As UIntPtr,   ' UINT_PTR
    pcbWrittenOrRequired As IntPtr   ' UINT_PTR* optional, out
) As Boolean
End Function

' dwFlags : DWORD
' hActCtx : HANDLE
' pvSubInstance : void* optional
' ulInfoClass : DWORD
' pvBuffer : void* optional, out
' cbBuffer : UINT_PTR
' pcbWrittenOrRequired : UINT_PTR* optional, out
Declare PtrSafe Function QueryActCtxW Lib "kernel32" ( _
    ByVal dwFlags As Long, _
    ByVal hActCtx As LongPtr, _
    ByVal pvSubInstance As LongPtr, _
    ByVal ulInfoClass As Long, _
    ByVal pvBuffer As LongPtr, _
    ByVal cbBuffer As LongPtr, _
    ByVal pcbWrittenOrRequired 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

QueryActCtxW = ctypes.windll.kernel32.QueryActCtxW
QueryActCtxW.restype = wintypes.BOOL
QueryActCtxW.argtypes = [
    wintypes.DWORD,  # dwFlags : DWORD
    wintypes.HANDLE,  # hActCtx : HANDLE
    ctypes.POINTER(None),  # pvSubInstance : void* optional
    wintypes.DWORD,  # ulInfoClass : DWORD
    ctypes.POINTER(None),  # pvBuffer : void* optional, out
    ctypes.c_size_t,  # cbBuffer : UINT_PTR
    ctypes.POINTER(ctypes.c_size_t),  # pcbWrittenOrRequired : UINT_PTR* optional, out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
QueryActCtxW = Fiddle::Function.new(
  lib['QueryActCtxW'],
  [
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
    Fiddle::TYPE_VOIDP,  # hActCtx : HANDLE
    Fiddle::TYPE_VOIDP,  # pvSubInstance : void* optional
    -Fiddle::TYPE_INT,  # ulInfoClass : DWORD
    Fiddle::TYPE_VOIDP,  # pvBuffer : void* optional, out
    Fiddle::TYPE_UINTPTR_T,  # cbBuffer : UINT_PTR
    Fiddle::TYPE_VOIDP,  # pcbWrittenOrRequired : UINT_PTR* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn QueryActCtxW(
        dwFlags: u32,  // DWORD
        hActCtx: *mut core::ffi::c_void,  // HANDLE
        pvSubInstance: *mut (),  // void* optional
        ulInfoClass: u32,  // DWORD
        pvBuffer: *mut (),  // void* optional, out
        cbBuffer: usize,  // UINT_PTR
        pcbWrittenOrRequired: *mut usize  // UINT_PTR* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool QueryActCtxW(uint dwFlags, IntPtr hActCtx, IntPtr pvSubInstance, uint ulInfoClass, IntPtr pvBuffer, UIntPtr cbBuffer, IntPtr pcbWrittenOrRequired);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_QueryActCtxW' -Namespace Win32 -PassThru
# $api::QueryActCtxW(dwFlags, hActCtx, pvSubInstance, ulInfoClass, pvBuffer, cbBuffer, pcbWrittenOrRequired)

#uselib "KERNEL32.dll"
#func global QueryActCtxW "QueryActCtxW" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; QueryActCtxW dwFlags, hActCtx, pvSubInstance, ulInfoClass, pvBuffer, cbBuffer, varptr(pcbWrittenOrRequired)   ; 戻り値は stat
; dwFlags : DWORD -> "sptr"
; hActCtx : HANDLE -> "sptr"
; pvSubInstance : void* optional -> "sptr"
; ulInfoClass : DWORD -> "sptr"
; pvBuffer : void* optional, out -> "sptr"
; cbBuffer : UINT_PTR -> "sptr"
; pcbWrittenOrRequired : UINT_PTR* optional, 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 "KERNEL32.dll"
#cfunc global QueryActCtxW "QueryActCtxW" int, sptr, sptr, int, sptr, sptr, var
; res = QueryActCtxW(dwFlags, hActCtx, pvSubInstance, ulInfoClass, pvBuffer, cbBuffer, pcbWrittenOrRequired)
; dwFlags : DWORD -> "int"
; hActCtx : HANDLE -> "sptr"
; pvSubInstance : void* optional -> "sptr"
; ulInfoClass : DWORD -> "int"
; pvBuffer : void* optional, out -> "sptr"
; cbBuffer : UINT_PTR -> "sptr"
; pcbWrittenOrRequired : UINT_PTR* optional, 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 "KERNEL32.dll"
#cfunc global QueryActCtxW "QueryActCtxW" int, sptr, sptr, int, sptr, sptr, sptr
; res = QueryActCtxW(dwFlags, hActCtx, pvSubInstance, ulInfoClass, pvBuffer, cbBuffer, varptr(pcbWrittenOrRequired))
; dwFlags : DWORD -> "int"
; hActCtx : HANDLE -> "sptr"
; pvSubInstance : void* optional -> "sptr"
; ulInfoClass : DWORD -> "int"
; pvBuffer : void* optional, out -> "sptr"
; cbBuffer : UINT_PTR -> "sptr"
; pcbWrittenOrRequired : UINT_PTR* optional, 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:

; BOOL QueryActCtxW(DWORD dwFlags, HANDLE hActCtx, void* pvSubInstance, DWORD ulInfoClass, void* pvBuffer, UINT_PTR cbBuffer, UINT_PTR* pcbWrittenOrRequired)
#uselib "KERNEL32.dll"
#cfunc global QueryActCtxW "QueryActCtxW" int, intptr, intptr, int, intptr, intptr, var
; res = QueryActCtxW(dwFlags, hActCtx, pvSubInstance, ulInfoClass, pvBuffer, cbBuffer, pcbWrittenOrRequired)
; dwFlags : DWORD -> "int"
; hActCtx : HANDLE -> "intptr"
; pvSubInstance : void* optional -> "intptr"
; ulInfoClass : DWORD -> "int"
; pvBuffer : void* optional, out -> "intptr"
; cbBuffer : UINT_PTR -> "intptr"
; pcbWrittenOrRequired : UINT_PTR* optional, 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。; BOOL QueryActCtxW(DWORD dwFlags, HANDLE hActCtx, void* pvSubInstance, DWORD ulInfoClass, void* pvBuffer, UINT_PTR cbBuffer, UINT_PTR* pcbWrittenOrRequired)
#uselib "KERNEL32.dll"
#cfunc global QueryActCtxW "QueryActCtxW" int, intptr, intptr, int, intptr, intptr, intptr
; res = QueryActCtxW(dwFlags, hActCtx, pvSubInstance, ulInfoClass, pvBuffer, cbBuffer, varptr(pcbWrittenOrRequired))
; dwFlags : DWORD -> "int"
; hActCtx : HANDLE -> "intptr"
; pvSubInstance : void* optional -> "intptr"
; ulInfoClass : DWORD -> "int"
; pvBuffer : void* optional, out -> "intptr"
; cbBuffer : UINT_PTR -> "intptr"
; pcbWrittenOrRequired : UINT_PTR* optional, 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 (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procQueryActCtxW = kernel32.NewProc("QueryActCtxW")
)

// dwFlags (DWORD), hActCtx (HANDLE), pvSubInstance (void* optional), ulInfoClass (DWORD), pvBuffer (void* optional, out), cbBuffer (UINT_PTR), pcbWrittenOrRequired (UINT_PTR* optional, out)
r1, _, err := procQueryActCtxW.Call(
	uintptr(dwFlags),
	uintptr(hActCtx),
	uintptr(pvSubInstance),
	uintptr(ulInfoClass),
	uintptr(pvBuffer),
	uintptr(cbBuffer),
	uintptr(pcbWrittenOrRequired),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function QueryActCtxW(
  dwFlags: DWORD;   // DWORD
  hActCtx: THandle;   // HANDLE
  pvSubInstance: Pointer;   // void* optional
  ulInfoClass: DWORD;   // DWORD
  pvBuffer: Pointer;   // void* optional, out
  cbBuffer: NativeUInt;   // UINT_PTR
  pcbWrittenOrRequired: Pointer   // UINT_PTR* optional, out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'QueryActCtxW';

result := DllCall("KERNEL32\QueryActCtxW"
    , "UInt", dwFlags   ; DWORD
    , "Ptr", hActCtx   ; HANDLE
    , "Ptr", pvSubInstance   ; void* optional
    , "UInt", ulInfoClass   ; DWORD
    , "Ptr", pvBuffer   ; void* optional, out
    , "UPtr", cbBuffer   ; UINT_PTR
    , "Ptr", pcbWrittenOrRequired   ; UINT_PTR* optional, out
    , "Int")   ; return: BOOL

●QueryActCtxW(dwFlags, hActCtx, pvSubInstance, ulInfoClass, pvBuffer, cbBuffer, pcbWrittenOrRequired) = DLL("KERNEL32.dll", "bool QueryActCtxW(dword, void*, void*, dword, void*, int, void*)")
# 呼び出し: QueryActCtxW(dwFlags, hActCtx, pvSubInstance, ulInfoClass, pvBuffer, cbBuffer, pcbWrittenOrRequired)
# dwFlags : DWORD -> "dword"
# hActCtx : HANDLE -> "void*"
# pvSubInstance : void* optional -> "void*"
# ulInfoClass : DWORD -> "dword"
# pvBuffer : void* optional, out -> "void*"
# cbBuffer : UINT_PTR -> "int"
# pcbWrittenOrRequired : UINT_PTR* optional, 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)。