WSAGetServiceClassNameByClassIdA

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

INT WSAGetServiceClassNameByClassIdA(
    GUID* lpServiceClassId,
    LPSTR lpszServiceClassName,
    DWORD* lpdwBufferLength
);

<DllImport("WS2_32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WSAGetServiceClassNameByClassIdA(
    ByRef lpServiceClassId As Guid,   ' GUID*
    <MarshalAs(UnmanagedType.LPStr)> lpszServiceClassName As System.Text.StringBuilder,   ' LPSTR out
    ByRef lpdwBufferLength As UInteger   ' DWORD* in/out
) As Integer
End Function

' lpServiceClassId : GUID*
' lpszServiceClassName : LPSTR out
' lpdwBufferLength : DWORD* in/out
Declare PtrSafe Function WSAGetServiceClassNameByClassIdA Lib "ws2_32" ( _
    ByVal lpServiceClassId As LongPtr, _
    ByVal lpszServiceClassName As String, _
    ByRef lpdwBufferLength 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

WSAGetServiceClassNameByClassIdA = ctypes.windll.ws2_32.WSAGetServiceClassNameByClassIdA
WSAGetServiceClassNameByClassIdA.restype = ctypes.c_int
WSAGetServiceClassNameByClassIdA.argtypes = [
    ctypes.c_void_p,  # lpServiceClassId : GUID*
    wintypes.LPSTR,  # lpszServiceClassName : LPSTR out
    ctypes.POINTER(wintypes.DWORD),  # lpdwBufferLength : DWORD* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WS2_32.dll')
WSAGetServiceClassNameByClassIdA = Fiddle::Function.new(
  lib['WSAGetServiceClassNameByClassIdA'],
  [
    Fiddle::TYPE_VOIDP,  # lpServiceClassId : GUID*
    Fiddle::TYPE_VOIDP,  # lpszServiceClassName : LPSTR out
    Fiddle::TYPE_VOIDP,  # lpdwBufferLength : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ws2_32")]
extern "system" {
    fn WSAGetServiceClassNameByClassIdA(
        lpServiceClassId: *mut GUID,  // GUID*
        lpszServiceClassName: *mut u8,  // LPSTR out
        lpdwBufferLength: *mut u32  // DWORD* in/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 WSAGetServiceClassNameByClassIdA(ref Guid lpServiceClassId, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder lpszServiceClassName, ref uint lpdwBufferLength);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WS2_32_WSAGetServiceClassNameByClassIdA' -Namespace Win32 -PassThru
# $api::WSAGetServiceClassNameByClassIdA(lpServiceClassId, lpszServiceClassName, lpdwBufferLength)

#uselib "WS2_32.dll"
#func global WSAGetServiceClassNameByClassIdA "WSAGetServiceClassNameByClassIdA" sptr, sptr, sptr
; WSAGetServiceClassNameByClassIdA varptr(lpServiceClassId), varptr(lpszServiceClassName), varptr(lpdwBufferLength)   ; 戻り値は stat
; lpServiceClassId : GUID* -> "sptr"
; lpszServiceClassName : LPSTR out -> "sptr"
; lpdwBufferLength : DWORD* in/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 WSAGetServiceClassNameByClassIdA "WSAGetServiceClassNameByClassIdA" var, var, var
; res = WSAGetServiceClassNameByClassIdA(lpServiceClassId, lpszServiceClassName, lpdwBufferLength)
; lpServiceClassId : GUID* -> "var"
; lpszServiceClassName : LPSTR out -> "var"
; lpdwBufferLength : DWORD* in/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 WSAGetServiceClassNameByClassIdA(GUID* lpServiceClassId, LPSTR lpszServiceClassName, DWORD* lpdwBufferLength)
#uselib "WS2_32.dll"
#cfunc global WSAGetServiceClassNameByClassIdA "WSAGetServiceClassNameByClassIdA" var, var, var
; res = WSAGetServiceClassNameByClassIdA(lpServiceClassId, lpszServiceClassName, lpdwBufferLength)
; lpServiceClassId : GUID* -> "var"
; lpszServiceClassName : LPSTR out -> "var"
; lpdwBufferLength : DWORD* in/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")
	procWSAGetServiceClassNameByClassIdA = ws2_32.NewProc("WSAGetServiceClassNameByClassIdA")
)

// lpServiceClassId (GUID*), lpszServiceClassName (LPSTR out), lpdwBufferLength (DWORD* in/out)
r1, _, err := procWSAGetServiceClassNameByClassIdA.Call(
	uintptr(lpServiceClassId),
	uintptr(lpszServiceClassName),
	uintptr(lpdwBufferLength),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function WSAGetServiceClassNameByClassIdA(
  lpServiceClassId: PGUID;   // GUID*
  lpszServiceClassName: PAnsiChar;   // LPSTR out
  lpdwBufferLength: Pointer   // DWORD* in/out
): Integer; stdcall;
  external 'WS2_32.dll' name 'WSAGetServiceClassNameByClassIdA';

result := DllCall("WS2_32\WSAGetServiceClassNameByClassIdA"
    , "Ptr", lpServiceClassId   ; GUID*
    , "Ptr", lpszServiceClassName   ; LPSTR out
    , "Ptr", lpdwBufferLength   ; DWORD* in/out
    , "Int")   ; return: INT

●WSAGetServiceClassNameByClassIdA(lpServiceClassId, lpszServiceClassName, lpdwBufferLength) = DLL("WS2_32.dll", "int WSAGetServiceClassNameByClassIdA(void*, char*, void*)")
# 呼び出し: WSAGetServiceClassNameByClassIdA(lpServiceClassId, lpszServiceClassName, lpdwBufferLength)
# lpServiceClassId : GUID* -> "void*"
# lpszServiceClassName : LPSTR out -> "char*"
# lpdwBufferLength : DWORD* in/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)。