D3DReadFileToBlob

// D3DCOMPILER_47.dll
#include <windows.h>

HRESULT D3DReadFileToBlob(
    LPCWSTR pFileName,
    ID3DBlob** ppContents
);

<DllImport("D3DCOMPILER_47.dll", ExactSpelling:=True)>
Public Shared Function D3DReadFileToBlob(
    <MarshalAs(UnmanagedType.LPWStr)> pFileName As String,   ' LPCWSTR
    ppContents As IntPtr   ' ID3DBlob** out
) As Integer
End Function

' pFileName : LPCWSTR
' ppContents : ID3DBlob** out
Declare PtrSafe Function D3DReadFileToBlob Lib "d3dcompiler_47" ( _
    ByVal pFileName As LongPtr, _
    ByVal ppContents 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

D3DReadFileToBlob = ctypes.windll.d3dcompiler_47.D3DReadFileToBlob
D3DReadFileToBlob.restype = ctypes.c_int
D3DReadFileToBlob.argtypes = [
    wintypes.LPCWSTR,  # pFileName : LPCWSTR
    ctypes.c_void_p,  # ppContents : ID3DBlob** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('D3DCOMPILER_47.dll')
D3DReadFileToBlob = Fiddle::Function.new(
  lib['D3DReadFileToBlob'],
  [
    Fiddle::TYPE_VOIDP,  # pFileName : LPCWSTR
    Fiddle::TYPE_VOIDP,  # ppContents : ID3DBlob** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "d3dcompiler_47")]
extern "system" {
    fn D3DReadFileToBlob(
        pFileName: *const u16,  // LPCWSTR
        ppContents: *mut *mut core::ffi::c_void  // ID3DBlob** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("D3DCOMPILER_47.dll")]
public static extern int D3DReadFileToBlob([MarshalAs(UnmanagedType.LPWStr)] string pFileName, IntPtr ppContents);
"@
$api = Add-Type -MemberDefinition $sig -Name 'D3DCOMPILER_47_D3DReadFileToBlob' -Namespace Win32 -PassThru
# $api::D3DReadFileToBlob(pFileName, ppContents)

#uselib "D3DCOMPILER_47.dll"
#func global D3DReadFileToBlob "D3DReadFileToBlob" sptr, sptr
; D3DReadFileToBlob pFileName, ppContents   ; 戻り値は stat
; pFileName : LPCWSTR -> "sptr"
; ppContents : ID3DBlob** 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。

#uselib "D3DCOMPILER_47.dll"
#cfunc global D3DReadFileToBlob "D3DReadFileToBlob" wstr, sptr
; res = D3DReadFileToBlob(pFileName, ppContents)
; pFileName : LPCWSTR -> "wstr"
; ppContents : ID3DBlob** out -> "sptr"

; HRESULT D3DReadFileToBlob(LPCWSTR pFileName, ID3DBlob** ppContents)
#uselib "D3DCOMPILER_47.dll"
#cfunc global D3DReadFileToBlob "D3DReadFileToBlob" wstr, intptr
; res = D3DReadFileToBlob(pFileName, ppContents)
; pFileName : LPCWSTR -> "wstr"
; ppContents : ID3DBlob** out -> "intptr"

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

var (
	d3dcompiler_47 = windows.NewLazySystemDLL("D3DCOMPILER_47.dll")
	procD3DReadFileToBlob = d3dcompiler_47.NewProc("D3DReadFileToBlob")
)

// pFileName (LPCWSTR), ppContents (ID3DBlob** out)
r1, _, err := procD3DReadFileToBlob.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pFileName))),
	uintptr(ppContents),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function D3DReadFileToBlob(
  pFileName: PWideChar;   // LPCWSTR
  ppContents: Pointer   // ID3DBlob** out
): Integer; stdcall;
  external 'D3DCOMPILER_47.dll' name 'D3DReadFileToBlob';

result := DllCall("D3DCOMPILER_47\D3DReadFileToBlob"
    , "WStr", pFileName   ; LPCWSTR
    , "Ptr", ppContents   ; ID3DBlob** out
    , "Int")   ; return: HRESULT

●D3DReadFileToBlob(pFileName, ppContents) = DLL("D3DCOMPILER_47.dll", "int D3DReadFileToBlob(char*, void*)")
# 呼び出し: D3DReadFileToBlob(pFileName, ppContents)
# pFileName : LPCWSTR -> "char*"
# ppContents : ID3DBlob** 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)。