DirectDrawEnumerateExW

// DDRAW.dll  (Unicode / -W)
#include <windows.h>

HRESULT DirectDrawEnumerateExW(
    LPDDENUMCALLBACKEXW lpCallback,
    void* lpContext,
    DWORD dwFlags
);

<DllImport("DDRAW.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function DirectDrawEnumerateExW(
    lpCallback As IntPtr,   ' LPDDENUMCALLBACKEXW
    lpContext As IntPtr,   ' void* in/out
    dwFlags As UInteger   ' DWORD
) As Integer
End Function

' lpCallback : LPDDENUMCALLBACKEXW
' lpContext : void* in/out
' dwFlags : DWORD
Declare PtrSafe Function DirectDrawEnumerateExW Lib "ddraw" ( _
    ByVal lpCallback As LongPtr, _
    ByVal lpContext As LongPtr, _
    ByVal dwFlags As Long) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

DirectDrawEnumerateExW = ctypes.windll.ddraw.DirectDrawEnumerateExW
DirectDrawEnumerateExW.restype = ctypes.c_int
DirectDrawEnumerateExW.argtypes = [
    ctypes.c_void_p,  # lpCallback : LPDDENUMCALLBACKEXW
    ctypes.POINTER(None),  # lpContext : void* in/out
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DDRAW.dll')
DirectDrawEnumerateExW = Fiddle::Function.new(
  lib['DirectDrawEnumerateExW'],
  [
    Fiddle::TYPE_VOIDP,  # lpCallback : LPDDENUMCALLBACKEXW
    Fiddle::TYPE_VOIDP,  # lpContext : void* in/out
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "ddraw")]
extern "system" {
    fn DirectDrawEnumerateExW(
        lpCallback: *const core::ffi::c_void,  // LPDDENUMCALLBACKEXW
        lpContext: *mut (),  // void* in/out
        dwFlags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("DDRAW.dll", CharSet = CharSet.Unicode)]
public static extern int DirectDrawEnumerateExW(IntPtr lpCallback, IntPtr lpContext, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DDRAW_DirectDrawEnumerateExW' -Namespace Win32 -PassThru
# $api::DirectDrawEnumerateExW(lpCallback, lpContext, dwFlags)

#uselib "DDRAW.dll"
#func global DirectDrawEnumerateExW "DirectDrawEnumerateExW" wptr, wptr, wptr
; DirectDrawEnumerateExW lpCallback, lpContext, dwFlags   ; 戻り値は stat
; lpCallback : LPDDENUMCALLBACKEXW -> "wptr"
; lpContext : void* in/out -> "wptr"
; dwFlags : DWORD -> "wptr"
; ※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 "DDRAW.dll"
#cfunc global DirectDrawEnumerateExW "DirectDrawEnumerateExW" sptr, sptr, int
; res = DirectDrawEnumerateExW(lpCallback, lpContext, dwFlags)
; lpCallback : LPDDENUMCALLBACKEXW -> "sptr"
; lpContext : void* in/out -> "sptr"
; dwFlags : DWORD -> "int"

; HRESULT DirectDrawEnumerateExW(LPDDENUMCALLBACKEXW lpCallback, void* lpContext, DWORD dwFlags)
#uselib "DDRAW.dll"
#cfunc global DirectDrawEnumerateExW "DirectDrawEnumerateExW" intptr, intptr, int
; res = DirectDrawEnumerateExW(lpCallback, lpContext, dwFlags)
; lpCallback : LPDDENUMCALLBACKEXW -> "intptr"
; lpContext : void* in/out -> "intptr"
; dwFlags : DWORD -> "int"

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

var (
	ddraw = windows.NewLazySystemDLL("DDRAW.dll")
	procDirectDrawEnumerateExW = ddraw.NewProc("DirectDrawEnumerateExW")
)

// lpCallback (LPDDENUMCALLBACKEXW), lpContext (void* in/out), dwFlags (DWORD)
r1, _, err := procDirectDrawEnumerateExW.Call(
	uintptr(lpCallback),
	uintptr(lpContext),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function DirectDrawEnumerateExW(
  lpCallback: Pointer;   // LPDDENUMCALLBACKEXW
  lpContext: Pointer;   // void* in/out
  dwFlags: DWORD   // DWORD
): Integer; stdcall;
  external 'DDRAW.dll' name 'DirectDrawEnumerateExW';

result := DllCall("DDRAW\DirectDrawEnumerateExW"
    , "Ptr", lpCallback   ; LPDDENUMCALLBACKEXW
    , "Ptr", lpContext   ; void* in/out
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: HRESULT

●DirectDrawEnumerateExW(lpCallback, lpContext, dwFlags) = DLL("DDRAW.dll", "int DirectDrawEnumerateExW(void*, void*, dword)")
# 呼び出し: DirectDrawEnumerateExW(lpCallback, lpContext, dwFlags)
# lpCallback : LPDDENUMCALLBACKEXW -> "void*"
# lpContext : void* in/out -> "void*"
# dwFlags : DWORD -> "dword"
# 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。