DoDragDrop

// OLE32.dll
#include <windows.h>

HRESULT DoDragDrop(
    IDataObject* pDataObj,
    IDropSource* pDropSource,
    DROPEFFECT dwOKEffects,
    DROPEFFECT* pdwEffect
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function DoDragDrop(
    pDataObj As IntPtr,   ' IDataObject*
    pDropSource As IntPtr,   ' IDropSource*
    dwOKEffects As UInteger,   ' DROPEFFECT
    <Out> ByRef pdwEffect As UInteger   ' DROPEFFECT* out
) As Integer
End Function

' pDataObj : IDataObject*
' pDropSource : IDropSource*
' dwOKEffects : DROPEFFECT
' pdwEffect : DROPEFFECT* out
Declare PtrSafe Function DoDragDrop Lib "ole32" ( _
    ByVal pDataObj As LongPtr, _
    ByVal pDropSource As LongPtr, _
    ByVal dwOKEffects As Long, _
    ByRef pdwEffect 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

DoDragDrop = ctypes.windll.ole32.DoDragDrop
DoDragDrop.restype = ctypes.c_int
DoDragDrop.argtypes = [
    ctypes.c_void_p,  # pDataObj : IDataObject*
    ctypes.c_void_p,  # pDropSource : IDropSource*
    wintypes.DWORD,  # dwOKEffects : DROPEFFECT
    ctypes.c_void_p,  # pdwEffect : DROPEFFECT* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
DoDragDrop = Fiddle::Function.new(
  lib['DoDragDrop'],
  [
    Fiddle::TYPE_VOIDP,  # pDataObj : IDataObject*
    Fiddle::TYPE_VOIDP,  # pDropSource : IDropSource*
    -Fiddle::TYPE_INT,  # dwOKEffects : DROPEFFECT
    Fiddle::TYPE_VOIDP,  # pdwEffect : DROPEFFECT* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ole32")]
extern "system" {
    fn DoDragDrop(
        pDataObj: *mut core::ffi::c_void,  // IDataObject*
        pDropSource: *mut core::ffi::c_void,  // IDropSource*
        dwOKEffects: u32,  // DROPEFFECT
        pdwEffect: *mut u32  // DROPEFFECT* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLE32.dll")]
public static extern int DoDragDrop(IntPtr pDataObj, IntPtr pDropSource, uint dwOKEffects, out uint pdwEffect);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_DoDragDrop' -Namespace Win32 -PassThru
# $api::DoDragDrop(pDataObj, pDropSource, dwOKEffects, pdwEffect)

#uselib "OLE32.dll"
#func global DoDragDrop "DoDragDrop" sptr, sptr, sptr, sptr
; DoDragDrop pDataObj, pDropSource, dwOKEffects, varptr(pdwEffect)   ; 戻り値は stat
; pDataObj : IDataObject* -> "sptr"
; pDropSource : IDropSource* -> "sptr"
; dwOKEffects : DROPEFFECT -> "sptr"
; pdwEffect : DROPEFFECT* 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 (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procDoDragDrop = ole32.NewProc("DoDragDrop")
)

// pDataObj (IDataObject*), pDropSource (IDropSource*), dwOKEffects (DROPEFFECT), pdwEffect (DROPEFFECT* out)
r1, _, err := procDoDragDrop.Call(
	uintptr(pDataObj),
	uintptr(pDropSource),
	uintptr(dwOKEffects),
	uintptr(pdwEffect),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function DoDragDrop(
  pDataObj: Pointer;   // IDataObject*
  pDropSource: Pointer;   // IDropSource*
  dwOKEffects: DWORD;   // DROPEFFECT
  pdwEffect: Pointer   // DROPEFFECT* out
): Integer; stdcall;
  external 'OLE32.dll' name 'DoDragDrop';

result := DllCall("OLE32\DoDragDrop"
    , "Ptr", pDataObj   ; IDataObject*
    , "Ptr", pDropSource   ; IDropSource*
    , "UInt", dwOKEffects   ; DROPEFFECT
    , "Ptr", pdwEffect   ; DROPEFFECT* out
    , "Int")   ; return: HRESULT

●DoDragDrop(pDataObj, pDropSource, dwOKEffects, pdwEffect) = DLL("OLE32.dll", "int DoDragDrop(void*, void*, dword, void*)")
# 呼び出し: DoDragDrop(pDataObj, pDropSource, dwOKEffects, pdwEffect)
# pDataObj : IDataObject* -> "void*"
# pDropSource : IDropSource* -> "void*"
# dwOKEffects : DROPEFFECT -> "dword"
# pdwEffect : DROPEFFECT* 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 "ole32" fn DoDragDrop(
    pDataObj: ?*anyopaque, // IDataObject*
    pDropSource: ?*anyopaque, // IDropSource*
    dwOKEffects: u32, // DROPEFFECT
    pdwEffect: [*c]u32 // DROPEFFECT* out
) callconv(std.os.windows.WINAPI) i32;

proc DoDragDrop(
    pDataObj: pointer,  # IDataObject*
    pDropSource: pointer,  # IDropSource*
    dwOKEffects: uint32,  # DROPEFFECT
    pdwEffect: ptr uint32  # DROPEFFECT* out
): int32 {.importc: "DoDragDrop", stdcall, dynlib: "OLE32.dll".}

pragma(lib, "ole32");
extern(Windows)
int DoDragDrop(
    void* pDataObj,   // IDataObject*
    void* pDropSource,   // IDropSource*
    uint dwOKEffects,   // DROPEFFECT
    uint* pdwEffect   // DROPEFFECT* out
);

ccall((:DoDragDrop, "OLE32.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Ptr{Cvoid}, UInt32, Ptr{UInt32}),
      pDataObj, pDropSource, dwOKEffects, pdwEffect)
# pDataObj : IDataObject* -> Ptr{Cvoid}
# pDropSource : IDropSource* -> Ptr{Cvoid}
# dwOKEffects : DROPEFFECT -> UInt32
# pdwEffect : DROPEFFECT* 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 DoDragDrop(
    void* pDataObj,
    void* pDropSource,
    uint32_t dwOKEffects,
    uint32_t* pdwEffect);
]]
local ole32 = ffi.load("ole32")
-- ole32.DoDragDrop(pDataObj, pDropSource, dwOKEffects, pdwEffect)
-- pDataObj : IDataObject*
-- pDropSource : IDropSource*
-- dwOKEffects : DROPEFFECT
-- pdwEffect : DROPEFFECT* 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('OLE32.dll');
const DoDragDrop = lib.func('__stdcall', 'DoDragDrop', 'int32_t', ['void *', 'void *', 'uint32_t', 'uint32_t *']);
// DoDragDrop(pDataObj, pDropSource, dwOKEffects, pdwEffect)
// pDataObj : IDataObject* -> 'void *'
// pDropSource : IDropSource* -> 'void *'
// dwOKEffects : DROPEFFECT -> 'uint32_t'
// pdwEffect : DROPEFFECT* 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("OLE32.dll", {
  DoDragDrop: { parameters: ["pointer", "pointer", "u32", "pointer"], result: "i32" },
});
// lib.symbols.DoDragDrop(pDataObj, pDropSource, dwOKEffects, pdwEffect)
// pDataObj : IDataObject* -> "pointer"
// pDropSource : IDropSource* -> "pointer"
// dwOKEffects : DROPEFFECT -> "u32"
// pdwEffect : DROPEFFECT* 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 DoDragDrop(
    void* pDataObj,
    void* pDropSource,
    uint32_t dwOKEffects,
    uint32_t* pdwEffect);
C, "OLE32.dll");
// $ffi->DoDragDrop(pDataObj, pDropSource, dwOKEffects, pdwEffect);
// pDataObj : IDataObject*
// pDropSource : IDropSource*
// dwOKEffects : DROPEFFECT
// pdwEffect : DROPEFFECT* 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 Ole32 extends StdCallLibrary {
    Ole32 INSTANCE = Native.load("ole32", Ole32.class);
    int DoDragDrop(
        Pointer pDataObj,   // IDataObject*
        Pointer pDropSource,   // IDropSource*
        int dwOKEffects,   // DROPEFFECT
        IntByReference pdwEffect   // DROPEFFECT* out
    );
}

@[Link("ole32")]
lib LibOLE32
  fun DoDragDrop = DoDragDrop(
    pDataObj : Void*,   # IDataObject*
    pDropSource : Void*,   # IDropSource*
    dwOKEffects : UInt32,   # DROPEFFECT
    pdwEffect : UInt32*   # DROPEFFECT* 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 DoDragDropNative = Int32 Function(Pointer<Void>, Pointer<Void>, Uint32, Pointer<Uint32>);
typedef DoDragDropDart = int Function(Pointer<Void>, Pointer<Void>, int, Pointer<Uint32>);
final DoDragDrop = DynamicLibrary.open('OLE32.dll')
    .lookupFunction<DoDragDropNative, DoDragDropDart>('DoDragDrop');
// pDataObj : IDataObject* -> Pointer<Void>
// pDropSource : IDropSource* -> Pointer<Void>
// dwOKEffects : DROPEFFECT -> Uint32
// pdwEffect : DROPEFFECT* out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DoDragDrop(
  pDataObj: Pointer;   // IDataObject*
  pDropSource: Pointer;   // IDropSource*
  dwOKEffects: DWORD;   // DROPEFFECT
  pdwEffect: Pointer   // DROPEFFECT* out
): Integer; stdcall;
  external 'OLE32.dll' name 'DoDragDrop';

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

foreign import stdcall safe "DoDragDrop"
  c_DoDragDrop :: Ptr () -> Ptr () -> Word32 -> Ptr Word32 -> IO Int32
-- pDataObj : IDataObject* -> Ptr ()
-- pDropSource : IDropSource* -> Ptr ()
-- dwOKEffects : DROPEFFECT -> Word32
-- pdwEffect : DROPEFFECT* 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 dodragdrop =
  foreign "DoDragDrop"
    ((ptr void) @-> (ptr void) @-> uint32_t @-> (ptr uint32_t) @-> returning int32_t)
(* pDataObj : IDataObject* -> (ptr void) *)
(* pDropSource : IDropSource* -> (ptr void) *)
(* dwOKEffects : DROPEFFECT -> uint32_t *)
(* pdwEffect : DROPEFFECT* 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 ole32 (t "OLE32.dll"))
(cffi:use-foreign-library ole32)

(cffi:defcfun ("DoDragDrop" do-drag-drop :convention :stdcall) :int32
  (p-data-obj :pointer)   ; IDataObject*
  (p-drop-source :pointer)   ; IDropSource*
  (dw-okeffects :uint32)   ; DROPEFFECT
  (pdw-effect :pointer))   ; DROPEFFECT* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $DoDragDrop = Win32::API::More->new('OLE32',
    'int DoDragDrop(LPVOID pDataObj, LPVOID pDropSource, DWORD dwOKEffects, LPVOID pdwEffect)');
# my $ret = $DoDragDrop->Call($pDataObj, $pDropSource, $dwOKEffects, $pdwEffect);
# pDataObj : IDataObject* -> LPVOID
# pDropSource : IDropSource* -> LPVOID
# dwOKEffects : DROPEFFECT -> DWORD
# pdwEffect : DROPEFFECT* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。