SLGetWindowsInformationDWORD

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

HRESULT SLGetWindowsInformationDWORD(
    LPCWSTR pwszValueName,
    DWORD* pdwValue
);

<DllImport("SLC.dll", ExactSpelling:=True)>
Public Shared Function SLGetWindowsInformationDWORD(
    <MarshalAs(UnmanagedType.LPWStr)> pwszValueName As String,   ' LPCWSTR
    <Out> ByRef pdwValue As UInteger   ' DWORD* out
) As Integer
End Function

' pwszValueName : LPCWSTR
' pdwValue : DWORD* out
Declare PtrSafe Function SLGetWindowsInformationDWORD Lib "slc" ( _
    ByVal pwszValueName As LongPtr, _
    ByRef pdwValue 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

SLGetWindowsInformationDWORD = ctypes.windll.slc.SLGetWindowsInformationDWORD
SLGetWindowsInformationDWORD.restype = ctypes.c_int
SLGetWindowsInformationDWORD.argtypes = [
    wintypes.LPCWSTR,  # pwszValueName : LPCWSTR
    ctypes.POINTER(wintypes.DWORD),  # pdwValue : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SLC.dll')
SLGetWindowsInformationDWORD = Fiddle::Function.new(
  lib['SLGetWindowsInformationDWORD'],
  [
    Fiddle::TYPE_VOIDP,  # pwszValueName : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pdwValue : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "slc")]
extern "system" {
    fn SLGetWindowsInformationDWORD(
        pwszValueName: *const u16,  // LPCWSTR
        pdwValue: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SLC.dll")]
public static extern int SLGetWindowsInformationDWORD([MarshalAs(UnmanagedType.LPWStr)] string pwszValueName, out uint pdwValue);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SLC_SLGetWindowsInformationDWORD' -Namespace Win32 -PassThru
# $api::SLGetWindowsInformationDWORD(pwszValueName, pdwValue)

#uselib "SLC.dll"
#func global SLGetWindowsInformationDWORD "SLGetWindowsInformationDWORD" sptr, sptr
; SLGetWindowsInformationDWORD pwszValueName, varptr(pdwValue)   ; 戻り値は stat
; pwszValueName : LPCWSTR -> "sptr"
; pdwValue : DWORD* 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 "SLC.dll"
#cfunc global SLGetWindowsInformationDWORD "SLGetWindowsInformationDWORD" wstr, var
; res = SLGetWindowsInformationDWORD(pwszValueName, pdwValue)
; pwszValueName : LPCWSTR -> "wstr"
; pdwValue : DWORD* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; HRESULT SLGetWindowsInformationDWORD(LPCWSTR pwszValueName, DWORD* pdwValue)
#uselib "SLC.dll"
#cfunc global SLGetWindowsInformationDWORD "SLGetWindowsInformationDWORD" wstr, var
; res = SLGetWindowsInformationDWORD(pwszValueName, pdwValue)
; pwszValueName : LPCWSTR -> "wstr"
; pdwValue : DWORD* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	slc = windows.NewLazySystemDLL("SLC.dll")
	procSLGetWindowsInformationDWORD = slc.NewProc("SLGetWindowsInformationDWORD")
)

// pwszValueName (LPCWSTR), pdwValue (DWORD* out)
r1, _, err := procSLGetWindowsInformationDWORD.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwszValueName))),
	uintptr(pdwValue),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function SLGetWindowsInformationDWORD(
  pwszValueName: PWideChar;   // LPCWSTR
  pdwValue: Pointer   // DWORD* out
): Integer; stdcall;
  external 'SLC.dll' name 'SLGetWindowsInformationDWORD';

result := DllCall("SLC\SLGetWindowsInformationDWORD"
    , "WStr", pwszValueName   ; LPCWSTR
    , "Ptr", pdwValue   ; DWORD* out
    , "Int")   ; return: HRESULT

●SLGetWindowsInformationDWORD(pwszValueName, pdwValue) = DLL("SLC.dll", "int SLGetWindowsInformationDWORD(char*, void*)")
# 呼び出し: SLGetWindowsInformationDWORD(pwszValueName, pdwValue)
# pwszValueName : LPCWSTR -> "char*"
# pdwValue : DWORD* 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)。