CheckColors

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

BOOL CheckColors(
    INT_PTR hColorTransform,
    COLOR* paInputColors,
    DWORD nColors,
    COLORTYPE ctInput,
    BYTE* paResult
);

<DllImport("mscms.dll", ExactSpelling:=True)>
Public Shared Function CheckColors(
    hColorTransform As IntPtr,   ' INT_PTR
    paInputColors As IntPtr,   ' COLOR*
    nColors As UInteger,   ' DWORD
    ctInput As Integer,   ' COLORTYPE
    paResult As IntPtr   ' BYTE* out
) As Boolean
End Function

' hColorTransform : INT_PTR
' paInputColors : COLOR*
' nColors : DWORD
' ctInput : COLORTYPE
' paResult : BYTE* out
Declare PtrSafe Function CheckColors Lib "mscms" ( _
    ByVal hColorTransform As LongPtr, _
    ByVal paInputColors As LongPtr, _
    ByVal nColors As Long, _
    ByVal ctInput As Long, _
    ByVal paResult 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

CheckColors = ctypes.windll.mscms.CheckColors
CheckColors.restype = wintypes.BOOL
CheckColors.argtypes = [
    ctypes.c_ssize_t,  # hColorTransform : INT_PTR
    ctypes.c_void_p,  # paInputColors : COLOR*
    wintypes.DWORD,  # nColors : DWORD
    ctypes.c_int,  # ctInput : COLORTYPE
    ctypes.POINTER(ctypes.c_ubyte),  # paResult : BYTE* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('mscms.dll')
CheckColors = Fiddle::Function.new(
  lib['CheckColors'],
  [
    Fiddle::TYPE_INTPTR_T,  # hColorTransform : INT_PTR
    Fiddle::TYPE_VOIDP,  # paInputColors : COLOR*
    -Fiddle::TYPE_INT,  # nColors : DWORD
    Fiddle::TYPE_INT,  # ctInput : COLORTYPE
    Fiddle::TYPE_VOIDP,  # paResult : BYTE* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "mscms")]
extern "system" {
    fn CheckColors(
        hColorTransform: isize,  // INT_PTR
        paInputColors: *mut COLOR,  // COLOR*
        nColors: u32,  // DWORD
        ctInput: i32,  // COLORTYPE
        paResult: *mut u8  // BYTE* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("mscms.dll")]
public static extern bool CheckColors(IntPtr hColorTransform, IntPtr paInputColors, uint nColors, int ctInput, IntPtr paResult);
"@
$api = Add-Type -MemberDefinition $sig -Name 'mscms_CheckColors' -Namespace Win32 -PassThru
# $api::CheckColors(hColorTransform, paInputColors, nColors, ctInput, paResult)

#uselib "mscms.dll"
#func global CheckColors "CheckColors" sptr, sptr, sptr, sptr, sptr
; CheckColors hColorTransform, varptr(paInputColors), nColors, ctInput, varptr(paResult)   ; 戻り値は stat
; hColorTransform : INT_PTR -> "sptr"
; paInputColors : COLOR* -> "sptr"
; nColors : DWORD -> "sptr"
; ctInput : COLORTYPE -> "sptr"
; paResult : BYTE* 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 "mscms.dll"
#cfunc global CheckColors "CheckColors" sptr, var, int, int, var
; res = CheckColors(hColorTransform, paInputColors, nColors, ctInput, paResult)
; hColorTransform : INT_PTR -> "sptr"
; paInputColors : COLOR* -> "var"
; nColors : DWORD -> "int"
; ctInput : COLORTYPE -> "int"
; paResult : BYTE* 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 CheckColors(INT_PTR hColorTransform, COLOR* paInputColors, DWORD nColors, COLORTYPE ctInput, BYTE* paResult)
#uselib "mscms.dll"
#cfunc global CheckColors "CheckColors" intptr, var, int, int, var
; res = CheckColors(hColorTransform, paInputColors, nColors, ctInput, paResult)
; hColorTransform : INT_PTR -> "intptr"
; paInputColors : COLOR* -> "var"
; nColors : DWORD -> "int"
; ctInput : COLORTYPE -> "int"
; paResult : BYTE* 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 (
	mscms = windows.NewLazySystemDLL("mscms.dll")
	procCheckColors = mscms.NewProc("CheckColors")
)

// hColorTransform (INT_PTR), paInputColors (COLOR*), nColors (DWORD), ctInput (COLORTYPE), paResult (BYTE* out)
r1, _, err := procCheckColors.Call(
	uintptr(hColorTransform),
	uintptr(paInputColors),
	uintptr(nColors),
	uintptr(ctInput),
	uintptr(paResult),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CheckColors(
  hColorTransform: NativeInt;   // INT_PTR
  paInputColors: Pointer;   // COLOR*
  nColors: DWORD;   // DWORD
  ctInput: Integer;   // COLORTYPE
  paResult: Pointer   // BYTE* out
): BOOL; stdcall;
  external 'mscms.dll' name 'CheckColors';

result := DllCall("mscms\CheckColors"
    , "Ptr", hColorTransform   ; INT_PTR
    , "Ptr", paInputColors   ; COLOR*
    , "UInt", nColors   ; DWORD
    , "Int", ctInput   ; COLORTYPE
    , "Ptr", paResult   ; BYTE* out
    , "Int")   ; return: BOOL

●CheckColors(hColorTransform, paInputColors, nColors, ctInput, paResult) = DLL("mscms.dll", "bool CheckColors(int, void*, dword, int, void*)")
# 呼び出し: CheckColors(hColorTransform, paInputColors, nColors, ctInput, paResult)
# hColorTransform : INT_PTR -> "int"
# paInputColors : COLOR* -> "void*"
# nColors : DWORD -> "dword"
# ctInput : COLORTYPE -> "int"
# paResult : BYTE* 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)。