OpenFileMappingFromApp

// api-ms-win-core-memory-l1-1-3.dll
#include <windows.h>

HANDLE OpenFileMappingFromApp(
    DWORD DesiredAccess,
    BOOL InheritHandle,
    LPCWSTR Name
);

<DllImport("api-ms-win-core-memory-l1-1-3.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function OpenFileMappingFromApp(
    DesiredAccess As UInteger,   ' DWORD
    InheritHandle As Boolean,   ' BOOL
    <MarshalAs(UnmanagedType.LPWStr)> Name As String   ' LPCWSTR
) As IntPtr
End Function

' DesiredAccess : DWORD
' InheritHandle : BOOL
' Name : LPCWSTR
Declare PtrSafe Function OpenFileMappingFromApp Lib "api-ms-win-core-memory-l1-1-3" ( _
    ByVal DesiredAccess As Long, _
    ByVal InheritHandle As Long, _
    ByVal Name As LongPtr) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

OpenFileMappingFromApp = ctypes.windll.LoadLibrary("api-ms-win-core-memory-l1-1-3.dll").OpenFileMappingFromApp
OpenFileMappingFromApp.restype = ctypes.c_void_p
OpenFileMappingFromApp.argtypes = [
    wintypes.DWORD,  # DesiredAccess : DWORD
    wintypes.BOOL,  # InheritHandle : BOOL
    wintypes.LPCWSTR,  # Name : LPCWSTR
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('api-ms-win-core-memory-l1-1-3.dll')
OpenFileMappingFromApp = Fiddle::Function.new(
  lib['OpenFileMappingFromApp'],
  [
    -Fiddle::TYPE_INT,  # DesiredAccess : DWORD
    Fiddle::TYPE_INT,  # InheritHandle : BOOL
    Fiddle::TYPE_VOIDP,  # Name : LPCWSTR
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "api-ms-win-core-memory-l1-1-3")]
extern "system" {
    fn OpenFileMappingFromApp(
        DesiredAccess: u32,  // DWORD
        InheritHandle: i32,  // BOOL
        Name: *const u16  // LPCWSTR
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("api-ms-win-core-memory-l1-1-3.dll", SetLastError = true)]
public static extern IntPtr OpenFileMappingFromApp(uint DesiredAccess, bool InheritHandle, [MarshalAs(UnmanagedType.LPWStr)] string Name);
"@
$api = Add-Type -MemberDefinition $sig -Name 'api-ms-win-core-memory-l1-1-3_OpenFileMappingFromApp' -Namespace Win32 -PassThru
# $api::OpenFileMappingFromApp(DesiredAccess, InheritHandle, Name)

#uselib "api-ms-win-core-memory-l1-1-3.dll"
#func global OpenFileMappingFromApp "OpenFileMappingFromApp" sptr, sptr, sptr
; OpenFileMappingFromApp DesiredAccess, InheritHandle, Name   ; 戻り値は stat
; DesiredAccess : DWORD -> "sptr"
; InheritHandle : BOOL -> "sptr"
; Name : LPCWSTR -> "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 "api-ms-win-core-memory-l1-1-3.dll"
#cfunc global OpenFileMappingFromApp "OpenFileMappingFromApp" int, int, wstr
; res = OpenFileMappingFromApp(DesiredAccess, InheritHandle, Name)
; DesiredAccess : DWORD -> "int"
; InheritHandle : BOOL -> "int"
; Name : LPCWSTR -> "wstr"

; HANDLE OpenFileMappingFromApp(DWORD DesiredAccess, BOOL InheritHandle, LPCWSTR Name)
#uselib "api-ms-win-core-memory-l1-1-3.dll"
#cfunc global OpenFileMappingFromApp "OpenFileMappingFromApp" int, int, wstr
; res = OpenFileMappingFromApp(DesiredAccess, InheritHandle, Name)
; DesiredAccess : DWORD -> "int"
; InheritHandle : BOOL -> "int"
; Name : LPCWSTR -> "wstr"

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

var (
	api_ms_win_core_memory_l1_1_3 = windows.NewLazySystemDLL("api-ms-win-core-memory-l1-1-3.dll")
	procOpenFileMappingFromApp = api_ms_win_core_memory_l1_1_3.NewProc("OpenFileMappingFromApp")
)

// DesiredAccess (DWORD), InheritHandle (BOOL), Name (LPCWSTR)
r1, _, err := procOpenFileMappingFromApp.Call(
	uintptr(DesiredAccess),
	uintptr(InheritHandle),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(Name))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HANDLE

function OpenFileMappingFromApp(
  DesiredAccess: DWORD;   // DWORD
  InheritHandle: BOOL;   // BOOL
  Name: PWideChar   // LPCWSTR
): THandle; stdcall;
  external 'api-ms-win-core-memory-l1-1-3.dll' name 'OpenFileMappingFromApp';

result := DllCall("api-ms-win-core-memory-l1-1-3\OpenFileMappingFromApp"
    , "UInt", DesiredAccess   ; DWORD
    , "Int", InheritHandle   ; BOOL
    , "WStr", Name   ; LPCWSTR
    , "Ptr")   ; return: HANDLE

●OpenFileMappingFromApp(DesiredAccess, InheritHandle, Name) = DLL("api-ms-win-core-memory-l1-1-3.dll", "void* OpenFileMappingFromApp(dword, bool, char*)")
# 呼び出し: OpenFileMappingFromApp(DesiredAccess, InheritHandle, Name)
# DesiredAccess : DWORD -> "dword"
# InheritHandle : BOOL -> "bool"
# Name : LPCWSTR -> "char*"
# 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)。