WSAGetServiceClassInfoA

// WS2_32.dll  (ANSI / -A)
#include <windows.h>

INT WSAGetServiceClassInfoA(
    GUID* lpProviderId,
    GUID* lpServiceClassId,
    DWORD* lpdwBufSize,
    WSASERVICECLASSINFOA* lpServiceClassInfo
);

<DllImport("WS2_32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WSAGetServiceClassInfoA(
    ByRef lpProviderId As Guid,   ' GUID*
    ByRef lpServiceClassId As Guid,   ' GUID*
    ByRef lpdwBufSize As UInteger,   ' DWORD* in/out
    lpServiceClassInfo As IntPtr   ' WSASERVICECLASSINFOA* out
) As Integer
End Function

' lpProviderId : GUID*
' lpServiceClassId : GUID*
' lpdwBufSize : DWORD* in/out
' lpServiceClassInfo : WSASERVICECLASSINFOA* out
Declare PtrSafe Function WSAGetServiceClassInfoA Lib "ws2_32" ( _
    ByVal lpProviderId As LongPtr, _
    ByVal lpServiceClassId As LongPtr, _
    ByRef lpdwBufSize As Long, _
    ByVal lpServiceClassInfo 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

WSAGetServiceClassInfoA = ctypes.windll.ws2_32.WSAGetServiceClassInfoA
WSAGetServiceClassInfoA.restype = ctypes.c_int
WSAGetServiceClassInfoA.argtypes = [
    ctypes.c_void_p,  # lpProviderId : GUID*
    ctypes.c_void_p,  # lpServiceClassId : GUID*
    ctypes.POINTER(wintypes.DWORD),  # lpdwBufSize : DWORD* in/out
    ctypes.c_void_p,  # lpServiceClassInfo : WSASERVICECLASSINFOA* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WS2_32.dll')
WSAGetServiceClassInfoA = Fiddle::Function.new(
  lib['WSAGetServiceClassInfoA'],
  [
    Fiddle::TYPE_VOIDP,  # lpProviderId : GUID*
    Fiddle::TYPE_VOIDP,  # lpServiceClassId : GUID*
    Fiddle::TYPE_VOIDP,  # lpdwBufSize : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # lpServiceClassInfo : WSASERVICECLASSINFOA* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ws2_32")]
extern "system" {
    fn WSAGetServiceClassInfoA(
        lpProviderId: *mut GUID,  // GUID*
        lpServiceClassId: *mut GUID,  // GUID*
        lpdwBufSize: *mut u32,  // DWORD* in/out
        lpServiceClassInfo: *mut WSASERVICECLASSINFOA  // WSASERVICECLASSINFOA* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WS2_32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern int WSAGetServiceClassInfoA(ref Guid lpProviderId, ref Guid lpServiceClassId, ref uint lpdwBufSize, IntPtr lpServiceClassInfo);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WS2_32_WSAGetServiceClassInfoA' -Namespace Win32 -PassThru
# $api::WSAGetServiceClassInfoA(lpProviderId, lpServiceClassId, lpdwBufSize, lpServiceClassInfo)

#uselib "WS2_32.dll"
#func global WSAGetServiceClassInfoA "WSAGetServiceClassInfoA" sptr, sptr, sptr, sptr
; WSAGetServiceClassInfoA varptr(lpProviderId), varptr(lpServiceClassId), varptr(lpdwBufSize), varptr(lpServiceClassInfo)   ; 戻り値は stat
; lpProviderId : GUID* -> "sptr"
; lpServiceClassId : GUID* -> "sptr"
; lpdwBufSize : DWORD* in/out -> "sptr"
; lpServiceClassInfo : WSASERVICECLASSINFOA* 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 "WS2_32.dll"
#cfunc global WSAGetServiceClassInfoA "WSAGetServiceClassInfoA" var, var, var, var
; res = WSAGetServiceClassInfoA(lpProviderId, lpServiceClassId, lpdwBufSize, lpServiceClassInfo)
; lpProviderId : GUID* -> "var"
; lpServiceClassId : GUID* -> "var"
; lpdwBufSize : DWORD* in/out -> "var"
; lpServiceClassInfo : WSASERVICECLASSINFOA* 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。

; INT WSAGetServiceClassInfoA(GUID* lpProviderId, GUID* lpServiceClassId, DWORD* lpdwBufSize, WSASERVICECLASSINFOA* lpServiceClassInfo)
#uselib "WS2_32.dll"
#cfunc global WSAGetServiceClassInfoA "WSAGetServiceClassInfoA" var, var, var, var
; res = WSAGetServiceClassInfoA(lpProviderId, lpServiceClassId, lpdwBufSize, lpServiceClassInfo)
; lpProviderId : GUID* -> "var"
; lpServiceClassId : GUID* -> "var"
; lpdwBufSize : DWORD* in/out -> "var"
; lpServiceClassInfo : WSASERVICECLASSINFOA* 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 (
	ws2_32 = windows.NewLazySystemDLL("WS2_32.dll")
	procWSAGetServiceClassInfoA = ws2_32.NewProc("WSAGetServiceClassInfoA")
)

// lpProviderId (GUID*), lpServiceClassId (GUID*), lpdwBufSize (DWORD* in/out), lpServiceClassInfo (WSASERVICECLASSINFOA* out)
r1, _, err := procWSAGetServiceClassInfoA.Call(
	uintptr(lpProviderId),
	uintptr(lpServiceClassId),
	uintptr(lpdwBufSize),
	uintptr(lpServiceClassInfo),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function WSAGetServiceClassInfoA(
  lpProviderId: PGUID;   // GUID*
  lpServiceClassId: PGUID;   // GUID*
  lpdwBufSize: Pointer;   // DWORD* in/out
  lpServiceClassInfo: Pointer   // WSASERVICECLASSINFOA* out
): Integer; stdcall;
  external 'WS2_32.dll' name 'WSAGetServiceClassInfoA';

result := DllCall("WS2_32\WSAGetServiceClassInfoA"
    , "Ptr", lpProviderId   ; GUID*
    , "Ptr", lpServiceClassId   ; GUID*
    , "Ptr", lpdwBufSize   ; DWORD* in/out
    , "Ptr", lpServiceClassInfo   ; WSASERVICECLASSINFOA* out
    , "Int")   ; return: INT

●WSAGetServiceClassInfoA(lpProviderId, lpServiceClassId, lpdwBufSize, lpServiceClassInfo) = DLL("WS2_32.dll", "int WSAGetServiceClassInfoA(void*, void*, void*, void*)")
# 呼び出し: WSAGetServiceClassInfoA(lpProviderId, lpServiceClassId, lpdwBufSize, lpServiceClassInfo)
# lpProviderId : GUID* -> "void*"
# lpServiceClassId : GUID* -> "void*"
# lpdwBufSize : DWORD* in/out -> "void*"
# lpServiceClassInfo : WSASERVICECLASSINFOA* 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)。