EnumObjects

// GDI32.dll
#include <windows.h>

INT EnumObjects(
    HDC hdc,
    OBJ_TYPE nType,
    GOBJENUMPROC lpFunc,
    LPARAM lParam
);

<DllImport("GDI32.dll", ExactSpelling:=True)>
Public Shared Function EnumObjects(
    hdc As IntPtr,   ' HDC
    nType As Integer,   ' OBJ_TYPE
    lpFunc As IntPtr,   ' GOBJENUMPROC
    lParam As IntPtr   ' LPARAM
) As Integer
End Function

' hdc : HDC
' nType : OBJ_TYPE
' lpFunc : GOBJENUMPROC
' lParam : LPARAM
Declare PtrSafe Function EnumObjects Lib "gdi32" ( _
    ByVal hdc As LongPtr, _
    ByVal nType As Long, _
    ByVal lpFunc As LongPtr, _
    ByVal lParam 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

EnumObjects = ctypes.windll.gdi32.EnumObjects
EnumObjects.restype = ctypes.c_int
EnumObjects.argtypes = [
    wintypes.HANDLE,  # hdc : HDC
    ctypes.c_int,  # nType : OBJ_TYPE
    ctypes.c_void_p,  # lpFunc : GOBJENUMPROC
    ctypes.c_ssize_t,  # lParam : LPARAM
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('GDI32.dll')
EnumObjects = Fiddle::Function.new(
  lib['EnumObjects'],
  [
    Fiddle::TYPE_VOIDP,  # hdc : HDC
    Fiddle::TYPE_INT,  # nType : OBJ_TYPE
    Fiddle::TYPE_VOIDP,  # lpFunc : GOBJENUMPROC
    Fiddle::TYPE_INTPTR_T,  # lParam : LPARAM
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdi32")]
extern "system" {
    fn EnumObjects(
        hdc: *mut core::ffi::c_void,  // HDC
        nType: i32,  // OBJ_TYPE
        lpFunc: *const core::ffi::c_void,  // GOBJENUMPROC
        lParam: isize  // LPARAM
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("GDI32.dll")]
public static extern int EnumObjects(IntPtr hdc, int nType, IntPtr lpFunc, IntPtr lParam);
"@
$api = Add-Type -MemberDefinition $sig -Name 'GDI32_EnumObjects' -Namespace Win32 -PassThru
# $api::EnumObjects(hdc, nType, lpFunc, lParam)

#uselib "GDI32.dll"
#func global EnumObjects "EnumObjects" sptr, sptr, sptr, sptr
; EnumObjects hdc, nType, lpFunc, lParam   ; 戻り値は stat
; hdc : HDC -> "sptr"
; nType : OBJ_TYPE -> "sptr"
; lpFunc : GOBJENUMPROC -> "sptr"
; lParam : LPARAM -> "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 "GDI32.dll"
#cfunc global EnumObjects "EnumObjects" sptr, int, sptr, sptr
; res = EnumObjects(hdc, nType, lpFunc, lParam)
; hdc : HDC -> "sptr"
; nType : OBJ_TYPE -> "int"
; lpFunc : GOBJENUMPROC -> "sptr"
; lParam : LPARAM -> "sptr"

; INT EnumObjects(HDC hdc, OBJ_TYPE nType, GOBJENUMPROC lpFunc, LPARAM lParam)
#uselib "GDI32.dll"
#cfunc global EnumObjects "EnumObjects" intptr, int, intptr, intptr
; res = EnumObjects(hdc, nType, lpFunc, lParam)
; hdc : HDC -> "intptr"
; nType : OBJ_TYPE -> "int"
; lpFunc : GOBJENUMPROC -> "intptr"
; lParam : LPARAM -> "intptr"

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

var (
	gdi32 = windows.NewLazySystemDLL("GDI32.dll")
	procEnumObjects = gdi32.NewProc("EnumObjects")
)

// hdc (HDC), nType (OBJ_TYPE), lpFunc (GOBJENUMPROC), lParam (LPARAM)
r1, _, err := procEnumObjects.Call(
	uintptr(hdc),
	uintptr(nType),
	uintptr(lpFunc),
	uintptr(lParam),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function EnumObjects(
  hdc: THandle;   // HDC
  nType: Integer;   // OBJ_TYPE
  lpFunc: Pointer;   // GOBJENUMPROC
  lParam: NativeInt   // LPARAM
): Integer; stdcall;
  external 'GDI32.dll' name 'EnumObjects';

result := DllCall("GDI32\EnumObjects"
    , "Ptr", hdc   ; HDC
    , "Int", nType   ; OBJ_TYPE
    , "Ptr", lpFunc   ; GOBJENUMPROC
    , "Ptr", lParam   ; LPARAM
    , "Int")   ; return: INT

●EnumObjects(hdc, nType, lpFunc, lParam) = DLL("GDI32.dll", "int EnumObjects(void*, int, void*, int)")
# 呼び出し: EnumObjects(hdc, nType, lpFunc, lParam)
# hdc : HDC -> "void*"
# nType : OBJ_TYPE -> "int"
# lpFunc : GOBJENUMPROC -> "void*"
# lParam : LPARAM -> "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)。