GetMonitorRedGreenOrBlueDrive

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

INT GetMonitorRedGreenOrBlueDrive(
    HANDLE hMonitor,
    MC_DRIVE_TYPE dtDriveType,
    DWORD* pdwMinimumDrive,
    DWORD* pdwCurrentDrive,
    DWORD* pdwMaximumDrive
);

<DllImport("dxva2.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetMonitorRedGreenOrBlueDrive(
    hMonitor As IntPtr,   ' HANDLE
    dtDriveType As Integer,   ' MC_DRIVE_TYPE
    <Out> ByRef pdwMinimumDrive As UInteger,   ' DWORD* out
    <Out> ByRef pdwCurrentDrive As UInteger,   ' DWORD* out
    <Out> ByRef pdwMaximumDrive As UInteger   ' DWORD* out
) As Integer
End Function

' hMonitor : HANDLE
' dtDriveType : MC_DRIVE_TYPE
' pdwMinimumDrive : DWORD* out
' pdwCurrentDrive : DWORD* out
' pdwMaximumDrive : DWORD* out
Declare PtrSafe Function GetMonitorRedGreenOrBlueDrive Lib "dxva2" ( _
    ByVal hMonitor As LongPtr, _
    ByVal dtDriveType As Long, _
    ByRef pdwMinimumDrive As Long, _
    ByRef pdwCurrentDrive As Long, _
    ByRef pdwMaximumDrive 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

GetMonitorRedGreenOrBlueDrive = ctypes.windll.dxva2.GetMonitorRedGreenOrBlueDrive
GetMonitorRedGreenOrBlueDrive.restype = ctypes.c_int
GetMonitorRedGreenOrBlueDrive.argtypes = [
    wintypes.HANDLE,  # hMonitor : HANDLE
    ctypes.c_int,  # dtDriveType : MC_DRIVE_TYPE
    ctypes.POINTER(wintypes.DWORD),  # pdwMinimumDrive : DWORD* out
    ctypes.POINTER(wintypes.DWORD),  # pdwCurrentDrive : DWORD* out
    ctypes.POINTER(wintypes.DWORD),  # pdwMaximumDrive : DWORD* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dxva2.dll')
GetMonitorRedGreenOrBlueDrive = Fiddle::Function.new(
  lib['GetMonitorRedGreenOrBlueDrive'],
  [
    Fiddle::TYPE_VOIDP,  # hMonitor : HANDLE
    Fiddle::TYPE_INT,  # dtDriveType : MC_DRIVE_TYPE
    Fiddle::TYPE_VOIDP,  # pdwMinimumDrive : DWORD* out
    Fiddle::TYPE_VOIDP,  # pdwCurrentDrive : DWORD* out
    Fiddle::TYPE_VOIDP,  # pdwMaximumDrive : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "dxva2")]
extern "system" {
    fn GetMonitorRedGreenOrBlueDrive(
        hMonitor: *mut core::ffi::c_void,  // HANDLE
        dtDriveType: i32,  // MC_DRIVE_TYPE
        pdwMinimumDrive: *mut u32,  // DWORD* out
        pdwCurrentDrive: *mut u32,  // DWORD* out
        pdwMaximumDrive: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dxva2.dll", SetLastError = true)]
public static extern int GetMonitorRedGreenOrBlueDrive(IntPtr hMonitor, int dtDriveType, out uint pdwMinimumDrive, out uint pdwCurrentDrive, out uint pdwMaximumDrive);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dxva2_GetMonitorRedGreenOrBlueDrive' -Namespace Win32 -PassThru
# $api::GetMonitorRedGreenOrBlueDrive(hMonitor, dtDriveType, pdwMinimumDrive, pdwCurrentDrive, pdwMaximumDrive)

#uselib "dxva2.dll"
#func global GetMonitorRedGreenOrBlueDrive "GetMonitorRedGreenOrBlueDrive" sptr, sptr, sptr, sptr, sptr
; GetMonitorRedGreenOrBlueDrive hMonitor, dtDriveType, varptr(pdwMinimumDrive), varptr(pdwCurrentDrive), varptr(pdwMaximumDrive)   ; 戻り値は stat
; hMonitor : HANDLE -> "sptr"
; dtDriveType : MC_DRIVE_TYPE -> "sptr"
; pdwMinimumDrive : DWORD* out -> "sptr"
; pdwCurrentDrive : DWORD* out -> "sptr"
; pdwMaximumDrive : DWORD* 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 GetMonitorRedGreenOrBlueDrive "GetMonitorRedGreenOrBlueDrive" sptr, int, var, var, var
; res = GetMonitorRedGreenOrBlueDrive(hMonitor, dtDriveType, pdwMinimumDrive, pdwCurrentDrive, pdwMaximumDrive)
; hMonitor : HANDLE -> "sptr"
; dtDriveType : MC_DRIVE_TYPE -> "int"
; pdwMinimumDrive : DWORD* out -> "var"
; pdwCurrentDrive : DWORD* out -> "var"
; pdwMaximumDrive : DWORD* 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 GetMonitorRedGreenOrBlueDrive(HANDLE hMonitor, MC_DRIVE_TYPE dtDriveType, DWORD* pdwMinimumDrive, DWORD* pdwCurrentDrive, DWORD* pdwMaximumDrive)
#uselib "dxva2.dll"
#cfunc global GetMonitorRedGreenOrBlueDrive "GetMonitorRedGreenOrBlueDrive" intptr, int, var, var, var
; res = GetMonitorRedGreenOrBlueDrive(hMonitor, dtDriveType, pdwMinimumDrive, pdwCurrentDrive, pdwMaximumDrive)
; hMonitor : HANDLE -> "intptr"
; dtDriveType : MC_DRIVE_TYPE -> "int"
; pdwMinimumDrive : DWORD* out -> "var"
; pdwCurrentDrive : DWORD* out -> "var"
; pdwMaximumDrive : DWORD* 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")
	procGetMonitorRedGreenOrBlueDrive = dxva2.NewProc("GetMonitorRedGreenOrBlueDrive")
)

// hMonitor (HANDLE), dtDriveType (MC_DRIVE_TYPE), pdwMinimumDrive (DWORD* out), pdwCurrentDrive (DWORD* out), pdwMaximumDrive (DWORD* out)
r1, _, err := procGetMonitorRedGreenOrBlueDrive.Call(
	uintptr(hMonitor),
	uintptr(dtDriveType),
	uintptr(pdwMinimumDrive),
	uintptr(pdwCurrentDrive),
	uintptr(pdwMaximumDrive),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function GetMonitorRedGreenOrBlueDrive(
  hMonitor: THandle;   // HANDLE
  dtDriveType: Integer;   // MC_DRIVE_TYPE
  pdwMinimumDrive: Pointer;   // DWORD* out
  pdwCurrentDrive: Pointer;   // DWORD* out
  pdwMaximumDrive: Pointer   // DWORD* out
): Integer; stdcall;
  external 'dxva2.dll' name 'GetMonitorRedGreenOrBlueDrive';

result := DllCall("dxva2\GetMonitorRedGreenOrBlueDrive"
    , "Ptr", hMonitor   ; HANDLE
    , "Int", dtDriveType   ; MC_DRIVE_TYPE
    , "Ptr", pdwMinimumDrive   ; DWORD* out
    , "Ptr", pdwCurrentDrive   ; DWORD* out
    , "Ptr", pdwMaximumDrive   ; DWORD* out
    , "Int")   ; return: INT

●GetMonitorRedGreenOrBlueDrive(hMonitor, dtDriveType, pdwMinimumDrive, pdwCurrentDrive, pdwMaximumDrive) = DLL("dxva2.dll", "int GetMonitorRedGreenOrBlueDrive(void*, int, void*, void*, void*)")
# 呼び出し: GetMonitorRedGreenOrBlueDrive(hMonitor, dtDriveType, pdwMinimumDrive, pdwCurrentDrive, pdwMaximumDrive)
# hMonitor : HANDLE -> "void*"
# dtDriveType : MC_DRIVE_TYPE -> "int"
# pdwMinimumDrive : DWORD* out -> "void*"
# pdwCurrentDrive : DWORD* out -> "void*"
# pdwMaximumDrive : DWORD* 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)。