GetVCPFeatureAndVCPFeatureReply

// dxva2.dll
#include <windows.h>

INT GetVCPFeatureAndVCPFeatureReply(
    HANDLE hMonitor,
    BYTE bVCPCode,
    MC_VCP_CODE_TYPE* pvct,   // optional
    DWORD* pdwCurrentValue,
    DWORD* pdwMaximumValue   // optional
);

<DllImport("dxva2.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetVCPFeatureAndVCPFeatureReply(
    hMonitor As IntPtr,   ' HANDLE
    bVCPCode As Byte,   ' BYTE
    pvct As IntPtr,   ' MC_VCP_CODE_TYPE* optional, out
    <Out> ByRef pdwCurrentValue As UInteger,   ' DWORD* out
    pdwMaximumValue As IntPtr   ' DWORD* optional, out
) As Integer
End Function

' hMonitor : HANDLE
' bVCPCode : BYTE
' pvct : MC_VCP_CODE_TYPE* optional, out
' pdwCurrentValue : DWORD* out
' pdwMaximumValue : DWORD* optional, out
Declare PtrSafe Function GetVCPFeatureAndVCPFeatureReply Lib "dxva2" ( _
    ByVal hMonitor As LongPtr, _
    ByVal bVCPCode As Byte, _
    ByVal pvct As LongPtr, _
    ByRef pdwCurrentValue As Long, _
    ByVal pdwMaximumValue 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

GetVCPFeatureAndVCPFeatureReply = ctypes.windll.dxva2.GetVCPFeatureAndVCPFeatureReply
GetVCPFeatureAndVCPFeatureReply.restype = ctypes.c_int
GetVCPFeatureAndVCPFeatureReply.argtypes = [
    wintypes.HANDLE,  # hMonitor : HANDLE
    ctypes.c_ubyte,  # bVCPCode : BYTE
    ctypes.c_void_p,  # pvct : MC_VCP_CODE_TYPE* optional, out
    ctypes.POINTER(wintypes.DWORD),  # pdwCurrentValue : DWORD* out
    ctypes.POINTER(wintypes.DWORD),  # pdwMaximumValue : DWORD* optional, out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dxva2.dll')
GetVCPFeatureAndVCPFeatureReply = Fiddle::Function.new(
  lib['GetVCPFeatureAndVCPFeatureReply'],
  [
    Fiddle::TYPE_VOIDP,  # hMonitor : HANDLE
    -Fiddle::TYPE_CHAR,  # bVCPCode : BYTE
    Fiddle::TYPE_VOIDP,  # pvct : MC_VCP_CODE_TYPE* optional, out
    Fiddle::TYPE_VOIDP,  # pdwCurrentValue : DWORD* out
    Fiddle::TYPE_VOIDP,  # pdwMaximumValue : DWORD* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "dxva2")]
extern "system" {
    fn GetVCPFeatureAndVCPFeatureReply(
        hMonitor: *mut core::ffi::c_void,  // HANDLE
        bVCPCode: u8,  // BYTE
        pvct: *mut i32,  // MC_VCP_CODE_TYPE* optional, out
        pdwCurrentValue: *mut u32,  // DWORD* out
        pdwMaximumValue: *mut u32  // DWORD* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dxva2.dll", SetLastError = true)]
public static extern int GetVCPFeatureAndVCPFeatureReply(IntPtr hMonitor, byte bVCPCode, IntPtr pvct, out uint pdwCurrentValue, IntPtr pdwMaximumValue);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dxva2_GetVCPFeatureAndVCPFeatureReply' -Namespace Win32 -PassThru
# $api::GetVCPFeatureAndVCPFeatureReply(hMonitor, bVCPCode, pvct, pdwCurrentValue, pdwMaximumValue)

#uselib "dxva2.dll"
#func global GetVCPFeatureAndVCPFeatureReply "GetVCPFeatureAndVCPFeatureReply" sptr, sptr, sptr, sptr, sptr
; GetVCPFeatureAndVCPFeatureReply hMonitor, bVCPCode, pvct, varptr(pdwCurrentValue), varptr(pdwMaximumValue)   ; 戻り値は stat
; hMonitor : HANDLE -> "sptr"
; bVCPCode : BYTE -> "sptr"
; pvct : MC_VCP_CODE_TYPE* optional, out -> "sptr"
; pdwCurrentValue : DWORD* out -> "sptr"
; pdwMaximumValue : DWORD* 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。

#uselib "dxva2.dll"
#cfunc global GetVCPFeatureAndVCPFeatureReply "GetVCPFeatureAndVCPFeatureReply" sptr, int, int, var, var
; res = GetVCPFeatureAndVCPFeatureReply(hMonitor, bVCPCode, pvct, pdwCurrentValue, pdwMaximumValue)
; hMonitor : HANDLE -> "sptr"
; bVCPCode : BYTE -> "int"
; pvct : MC_VCP_CODE_TYPE* optional, out -> "int"
; pdwCurrentValue : DWORD* out -> "var"
; pdwMaximumValue : DWORD* 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。

; INT GetVCPFeatureAndVCPFeatureReply(HANDLE hMonitor, BYTE bVCPCode, MC_VCP_CODE_TYPE* pvct, DWORD* pdwCurrentValue, DWORD* pdwMaximumValue)
#uselib "dxva2.dll"
#cfunc global GetVCPFeatureAndVCPFeatureReply "GetVCPFeatureAndVCPFeatureReply" intptr, int, int, var, var
; res = GetVCPFeatureAndVCPFeatureReply(hMonitor, bVCPCode, pvct, pdwCurrentValue, pdwMaximumValue)
; hMonitor : HANDLE -> "intptr"
; bVCPCode : BYTE -> "int"
; pvct : MC_VCP_CODE_TYPE* optional, out -> "int"
; pdwCurrentValue : DWORD* out -> "var"
; pdwMaximumValue : DWORD* 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。

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

var (
	dxva2 = windows.NewLazySystemDLL("dxva2.dll")
	procGetVCPFeatureAndVCPFeatureReply = dxva2.NewProc("GetVCPFeatureAndVCPFeatureReply")
)

// hMonitor (HANDLE), bVCPCode (BYTE), pvct (MC_VCP_CODE_TYPE* optional, out), pdwCurrentValue (DWORD* out), pdwMaximumValue (DWORD* optional, out)
r1, _, err := procGetVCPFeatureAndVCPFeatureReply.Call(
	uintptr(hMonitor),
	uintptr(bVCPCode),
	uintptr(pvct),
	uintptr(pdwCurrentValue),
	uintptr(pdwMaximumValue),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function GetVCPFeatureAndVCPFeatureReply(
  hMonitor: THandle;   // HANDLE
  bVCPCode: Byte;   // BYTE
  pvct: Pointer;   // MC_VCP_CODE_TYPE* optional, out
  pdwCurrentValue: Pointer;   // DWORD* out
  pdwMaximumValue: Pointer   // DWORD* optional, out
): Integer; stdcall;
  external 'dxva2.dll' name 'GetVCPFeatureAndVCPFeatureReply';

result := DllCall("dxva2\GetVCPFeatureAndVCPFeatureReply"
    , "Ptr", hMonitor   ; HANDLE
    , "UChar", bVCPCode   ; BYTE
    , "Ptr", pvct   ; MC_VCP_CODE_TYPE* optional, out
    , "Ptr", pdwCurrentValue   ; DWORD* out
    , "Ptr", pdwMaximumValue   ; DWORD* optional, out
    , "Int")   ; return: INT

●GetVCPFeatureAndVCPFeatureReply(hMonitor, bVCPCode, pvct, pdwCurrentValue, pdwMaximumValue) = DLL("dxva2.dll", "int GetVCPFeatureAndVCPFeatureReply(void*, byte, void*, void*, void*)")
# 呼び出し: GetVCPFeatureAndVCPFeatureReply(hMonitor, bVCPCode, pvct, pdwCurrentValue, pdwMaximumValue)
# hMonitor : HANDLE -> "void*"
# bVCPCode : BYTE -> "byte"
# pvct : MC_VCP_CODE_TYPE* optional, out -> "void*"
# pdwCurrentValue : DWORD* out -> "void*"
# pdwMaximumValue : DWORD* 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)。