SetupFindFirstLineW

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

BOOL SetupFindFirstLineW(
    void* InfHandle,
    LPCWSTR Section,
    LPCWSTR Key,   // optional
    INFCONTEXT* Context
);

<DllImport("SETUPAPI.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetupFindFirstLineW(
    InfHandle As IntPtr,   ' void*
    <MarshalAs(UnmanagedType.LPWStr)> Section As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> Key As String,   ' LPCWSTR optional
    Context As IntPtr   ' INFCONTEXT* out
) As Boolean
End Function

' InfHandle : void*
' Section : LPCWSTR
' Key : LPCWSTR optional
' Context : INFCONTEXT* out
Declare PtrSafe Function SetupFindFirstLineW Lib "setupapi" ( _
    ByVal InfHandle As LongPtr, _
    ByVal Section As LongPtr, _
    ByVal Key As LongPtr, _
    ByVal Context As LongPtr) 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

SetupFindFirstLineW = ctypes.windll.setupapi.SetupFindFirstLineW
SetupFindFirstLineW.restype = wintypes.BOOL
SetupFindFirstLineW.argtypes = [
    ctypes.POINTER(None),  # InfHandle : void*
    wintypes.LPCWSTR,  # Section : LPCWSTR
    wintypes.LPCWSTR,  # Key : LPCWSTR optional
    ctypes.c_void_p,  # Context : INFCONTEXT* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SETUPAPI.dll')
SetupFindFirstLineW = Fiddle::Function.new(
  lib['SetupFindFirstLineW'],
  [
    Fiddle::TYPE_VOIDP,  # InfHandle : void*
    Fiddle::TYPE_VOIDP,  # Section : LPCWSTR
    Fiddle::TYPE_VOIDP,  # Key : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # Context : INFCONTEXT* out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "setupapi")]
extern "system" {
    fn SetupFindFirstLineW(
        InfHandle: *mut (),  // void*
        Section: *const u16,  // LPCWSTR
        Key: *const u16,  // LPCWSTR optional
        Context: *mut INFCONTEXT  // INFCONTEXT* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("SETUPAPI.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool SetupFindFirstLineW(IntPtr InfHandle, [MarshalAs(UnmanagedType.LPWStr)] string Section, [MarshalAs(UnmanagedType.LPWStr)] string Key, IntPtr Context);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SETUPAPI_SetupFindFirstLineW' -Namespace Win32 -PassThru
# $api::SetupFindFirstLineW(InfHandle, Section, Key, Context)

#uselib "SETUPAPI.dll"
#func global SetupFindFirstLineW "SetupFindFirstLineW" wptr, wptr, wptr, wptr
; SetupFindFirstLineW InfHandle, Section, Key, varptr(Context)   ; 戻り値は stat
; InfHandle : void* -> "wptr"
; Section : LPCWSTR -> "wptr"
; Key : LPCWSTR optional -> "wptr"
; Context : INFCONTEXT* out -> "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 "SETUPAPI.dll"
#cfunc global SetupFindFirstLineW "SetupFindFirstLineW" sptr, wstr, wstr, var
; res = SetupFindFirstLineW(InfHandle, Section, Key, Context)
; InfHandle : void* -> "sptr"
; Section : LPCWSTR -> "wstr"
; Key : LPCWSTR optional -> "wstr"
; Context : INFCONTEXT* 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。

; BOOL SetupFindFirstLineW(void* InfHandle, LPCWSTR Section, LPCWSTR Key, INFCONTEXT* Context)
#uselib "SETUPAPI.dll"
#cfunc global SetupFindFirstLineW "SetupFindFirstLineW" intptr, wstr, wstr, var
; res = SetupFindFirstLineW(InfHandle, Section, Key, Context)
; InfHandle : void* -> "intptr"
; Section : LPCWSTR -> "wstr"
; Key : LPCWSTR optional -> "wstr"
; Context : INFCONTEXT* 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 (
	setupapi = windows.NewLazySystemDLL("SETUPAPI.dll")
	procSetupFindFirstLineW = setupapi.NewProc("SetupFindFirstLineW")
)

// InfHandle (void*), Section (LPCWSTR), Key (LPCWSTR optional), Context (INFCONTEXT* out)
r1, _, err := procSetupFindFirstLineW.Call(
	uintptr(InfHandle),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(Section))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(Key))),
	uintptr(Context),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SetupFindFirstLineW(
  InfHandle: Pointer;   // void*
  Section: PWideChar;   // LPCWSTR
  Key: PWideChar;   // LPCWSTR optional
  Context: Pointer   // INFCONTEXT* out
): BOOL; stdcall;
  external 'SETUPAPI.dll' name 'SetupFindFirstLineW';

result := DllCall("SETUPAPI\SetupFindFirstLineW"
    , "Ptr", InfHandle   ; void*
    , "WStr", Section   ; LPCWSTR
    , "WStr", Key   ; LPCWSTR optional
    , "Ptr", Context   ; INFCONTEXT* out
    , "Int")   ; return: BOOL

●SetupFindFirstLineW(InfHandle, Section, Key, Context) = DLL("SETUPAPI.dll", "bool SetupFindFirstLineW(void*, char*, char*, void*)")
# 呼び出し: SetupFindFirstLineW(InfHandle, Section, Key, Context)
# InfHandle : void* -> "void*"
# Section : LPCWSTR -> "char*"
# Key : LPCWSTR optional -> "char*"
# Context : INFCONTEXT* 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。