SetMonitorColorTemperature

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

INT SetMonitorColorTemperature(
    HANDLE hMonitor,
    MC_COLOR_TEMPERATURE ctCurrentColorTemperature
);

<DllImport("dxva2.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetMonitorColorTemperature(
    hMonitor As IntPtr,   ' HANDLE
    ctCurrentColorTemperature As Integer   ' MC_COLOR_TEMPERATURE
) As Integer
End Function

' hMonitor : HANDLE
' ctCurrentColorTemperature : MC_COLOR_TEMPERATURE
Declare PtrSafe Function SetMonitorColorTemperature Lib "dxva2" ( _
    ByVal hMonitor As LongPtr, _
    ByVal ctCurrentColorTemperature 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

SetMonitorColorTemperature = ctypes.windll.dxva2.SetMonitorColorTemperature
SetMonitorColorTemperature.restype = ctypes.c_int
SetMonitorColorTemperature.argtypes = [
    wintypes.HANDLE,  # hMonitor : HANDLE
    ctypes.c_int,  # ctCurrentColorTemperature : MC_COLOR_TEMPERATURE
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dxva2.dll')
SetMonitorColorTemperature = Fiddle::Function.new(
  lib['SetMonitorColorTemperature'],
  [
    Fiddle::TYPE_VOIDP,  # hMonitor : HANDLE
    Fiddle::TYPE_INT,  # ctCurrentColorTemperature : MC_COLOR_TEMPERATURE
  ],
  Fiddle::TYPE_INT)

#[link(name = "dxva2")]
extern "system" {
    fn SetMonitorColorTemperature(
        hMonitor: *mut core::ffi::c_void,  // HANDLE
        ctCurrentColorTemperature: i32  // MC_COLOR_TEMPERATURE
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dxva2.dll", SetLastError = true)]
public static extern int SetMonitorColorTemperature(IntPtr hMonitor, int ctCurrentColorTemperature);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dxva2_SetMonitorColorTemperature' -Namespace Win32 -PassThru
# $api::SetMonitorColorTemperature(hMonitor, ctCurrentColorTemperature)

#uselib "dxva2.dll"
#func global SetMonitorColorTemperature "SetMonitorColorTemperature" sptr, sptr
; SetMonitorColorTemperature hMonitor, ctCurrentColorTemperature   ; 戻り値は stat
; hMonitor : HANDLE -> "sptr"
; ctCurrentColorTemperature : MC_COLOR_TEMPERATURE -> "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 SetMonitorColorTemperature "SetMonitorColorTemperature" sptr, int
; res = SetMonitorColorTemperature(hMonitor, ctCurrentColorTemperature)
; hMonitor : HANDLE -> "sptr"
; ctCurrentColorTemperature : MC_COLOR_TEMPERATURE -> "int"

; INT SetMonitorColorTemperature(HANDLE hMonitor, MC_COLOR_TEMPERATURE ctCurrentColorTemperature)
#uselib "dxva2.dll"
#cfunc global SetMonitorColorTemperature "SetMonitorColorTemperature" intptr, int
; res = SetMonitorColorTemperature(hMonitor, ctCurrentColorTemperature)
; hMonitor : HANDLE -> "intptr"
; ctCurrentColorTemperature : MC_COLOR_TEMPERATURE -> "int"

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

var (
	dxva2 = windows.NewLazySystemDLL("dxva2.dll")
	procSetMonitorColorTemperature = dxva2.NewProc("SetMonitorColorTemperature")
)

// hMonitor (HANDLE), ctCurrentColorTemperature (MC_COLOR_TEMPERATURE)
r1, _, err := procSetMonitorColorTemperature.Call(
	uintptr(hMonitor),
	uintptr(ctCurrentColorTemperature),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function SetMonitorColorTemperature(
  hMonitor: THandle;   // HANDLE
  ctCurrentColorTemperature: Integer   // MC_COLOR_TEMPERATURE
): Integer; stdcall;
  external 'dxva2.dll' name 'SetMonitorColorTemperature';

result := DllCall("dxva2\SetMonitorColorTemperature"
    , "Ptr", hMonitor   ; HANDLE
    , "Int", ctCurrentColorTemperature   ; MC_COLOR_TEMPERATURE
    , "Int")   ; return: INT

●SetMonitorColorTemperature(hMonitor, ctCurrentColorTemperature) = DLL("dxva2.dll", "int SetMonitorColorTemperature(void*, int)")
# 呼び出し: SetMonitorColorTemperature(hMonitor, ctCurrentColorTemperature)
# hMonitor : HANDLE -> "void*"
# ctCurrentColorTemperature : MC_COLOR_TEMPERATURE -> "int"
# 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)。