GdipGetNearestColor

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

Status GdipGetNearestColor(
    GpGraphics* graphics,
    DWORD* argb
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipGetNearestColor(
    graphics As IntPtr,   ' GpGraphics* in/out
    ByRef argb As UInteger   ' DWORD* in/out
) As Integer
End Function

' graphics : GpGraphics* in/out
' argb : DWORD* in/out
Declare PtrSafe Function GdipGetNearestColor Lib "gdiplus" ( _
    ByVal graphics As LongPtr, _
    ByRef argb 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

GdipGetNearestColor = ctypes.windll.gdiplus.GdipGetNearestColor
GdipGetNearestColor.restype = ctypes.c_int
GdipGetNearestColor.argtypes = [
    ctypes.c_void_p,  # graphics : GpGraphics* in/out
    ctypes.POINTER(wintypes.DWORD),  # argb : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipGetNearestColor = Fiddle::Function.new(
  lib['GdipGetNearestColor'],
  [
    Fiddle::TYPE_VOIDP,  # graphics : GpGraphics* in/out
    Fiddle::TYPE_VOIDP,  # argb : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipGetNearestColor(
        graphics: *mut GpGraphics,  // GpGraphics* in/out
        argb: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("gdiplus.dll")]
public static extern int GdipGetNearestColor(IntPtr graphics, ref uint argb);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipGetNearestColor' -Namespace Win32 -PassThru
# $api::GdipGetNearestColor(graphics, argb)

#uselib "gdiplus.dll"
#func global GdipGetNearestColor "GdipGetNearestColor" sptr, sptr
; GdipGetNearestColor varptr(graphics), varptr(argb)   ; 戻り値は stat
; graphics : GpGraphics* in/out -> "sptr"
; argb : DWORD* in/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。

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

var (
	gdiplus = windows.NewLazySystemDLL("gdiplus.dll")
	procGdipGetNearestColor = gdiplus.NewProc("GdipGetNearestColor")
)

// graphics (GpGraphics* in/out), argb (DWORD* in/out)
r1, _, err := procGdipGetNearestColor.Call(
	uintptr(graphics),
	uintptr(argb),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipGetNearestColor(
  graphics: Pointer;   // GpGraphics* in/out
  argb: Pointer   // DWORD* in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipGetNearestColor';

result := DllCall("gdiplus\GdipGetNearestColor"
    , "Ptr", graphics   ; GpGraphics* in/out
    , "Ptr", argb   ; DWORD* in/out
    , "Int")   ; return: Status

●GdipGetNearestColor(graphics, argb) = DLL("gdiplus.dll", "int GdipGetNearestColor(void*, void*)")
# 呼び出し: GdipGetNearestColor(graphics, argb)
# graphics : GpGraphics* in/out -> "void*"
# argb : DWORD* in/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)。

const std = @import("std");

extern "gdiplus" fn GdipGetNearestColor(
    graphics: [*c]GpGraphics, // GpGraphics* in/out
    argb: [*c]u32 // DWORD* in/out
) callconv(std.os.windows.WINAPI) i32;

proc GdipGetNearestColor(
    graphics: ptr GpGraphics,  # GpGraphics* in/out
    argb: ptr uint32  # DWORD* in/out
): int32 {.importc: "GdipGetNearestColor", stdcall, dynlib: "gdiplus.dll".}

pragma(lib, "gdiplus");
extern(Windows)
int GdipGetNearestColor(
    GpGraphics* graphics,   // GpGraphics* in/out
    uint* argb   // DWORD* in/out
);

ccall((:GdipGetNearestColor, "gdiplus.dll"), stdcall, Int32,
      (Ptr{GpGraphics}, Ptr{UInt32}),
      graphics, argb)
# graphics : GpGraphics* in/out -> Ptr{GpGraphics}
# argb : DWORD* in/out -> Ptr{UInt32}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t GdipGetNearestColor(
    void* graphics,
    uint32_t* argb);
]]
local gdiplus = ffi.load("gdiplus")
-- gdiplus.GdipGetNearestColor(graphics, argb)
-- graphics : GpGraphics* in/out
-- argb : DWORD* in/out
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('gdiplus.dll');
const GdipGetNearestColor = lib.func('__stdcall', 'GdipGetNearestColor', 'int32_t', ['void *', 'uint32_t *']);
// GdipGetNearestColor(graphics, argb)
// graphics : GpGraphics* in/out -> 'void *'
// argb : DWORD* in/out -> 'uint32_t *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("gdiplus.dll", {
  GdipGetNearestColor: { parameters: ["pointer", "pointer"], result: "i32" },
});
// lib.symbols.GdipGetNearestColor(graphics, argb)
// graphics : GpGraphics* in/out -> "pointer"
// argb : DWORD* in/out -> "pointer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t GdipGetNearestColor(
    void* graphics,
    uint32_t* argb);
C, "gdiplus.dll");
// $ffi->GdipGetNearestColor(graphics, argb);
// graphics : GpGraphics* in/out
// argb : DWORD* in/out
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Gdiplus extends StdCallLibrary {
    Gdiplus INSTANCE = Native.load("gdiplus", Gdiplus.class);
    int GdipGetNearestColor(
        Pointer graphics,   // GpGraphics* in/out
        IntByReference argb   // DWORD* in/out
    );
}

@[Link("gdiplus")]
lib Libgdiplus
  fun GdipGetNearestColor = GdipGetNearestColor(
    graphics : GpGraphics*,   # GpGraphics* in/out
    argb : UInt32*   # DWORD* in/out
  ) : Int32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef GdipGetNearestColorNative = Int32 Function(Pointer<Void>, Pointer<Uint32>);
typedef GdipGetNearestColorDart = int Function(Pointer<Void>, Pointer<Uint32>);
final GdipGetNearestColor = DynamicLibrary.open('gdiplus.dll')
    .lookupFunction<GdipGetNearestColorNative, GdipGetNearestColorDart>('GdipGetNearestColor');
// graphics : GpGraphics* in/out -> Pointer<Void>
// argb : DWORD* in/out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function GdipGetNearestColor(
  graphics: Pointer;   // GpGraphics* in/out
  argb: Pointer   // DWORD* in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipGetNearestColor';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "GdipGetNearestColor"
  c_GdipGetNearestColor :: Ptr () -> Ptr Word32 -> IO Int32
-- graphics : GpGraphics* in/out -> Ptr ()
-- argb : DWORD* in/out -> Ptr Word32
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let gdipgetnearestcolor =
  foreign "GdipGetNearestColor"
    ((ptr void) @-> (ptr uint32_t) @-> returning int32_t)
(* graphics : GpGraphics* in/out -> (ptr void) *)
(* argb : DWORD* in/out -> (ptr uint32_t) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library gdiplus (t "gdiplus.dll"))
(cffi:use-foreign-library gdiplus)

(cffi:defcfun ("GdipGetNearestColor" gdip-get-nearest-color :convention :stdcall) :int32
  (graphics :pointer)   ; GpGraphics* in/out
  (argb :pointer))   ; DWORD* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $GdipGetNearestColor = Win32::API::More->new('gdiplus',
    'int GdipGetNearestColor(LPVOID graphics, LPVOID argb)');
# my $ret = $GdipGetNearestColor->Call($graphics, $argb);
# graphics : GpGraphics* in/out -> LPVOID
# argb : DWORD* in/out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。