PdhParseCounterPathA

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

DWORD PdhParseCounterPathA(
    LPCSTR szFullPathBuffer,
    PDH_COUNTER_PATH_ELEMENTS_A* pCounterPathElements,   // optional
    DWORD* pdwBufferSize,
    DWORD dwFlags
);

<DllImport("pdh.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function PdhParseCounterPathA(
    <MarshalAs(UnmanagedType.LPStr)> szFullPathBuffer As String,   ' LPCSTR
    pCounterPathElements As IntPtr,   ' PDH_COUNTER_PATH_ELEMENTS_A* optional, out
    ByRef pdwBufferSize As UInteger,   ' DWORD* in/out
    dwFlags As UInteger   ' DWORD
) As UInteger
End Function

' szFullPathBuffer : LPCSTR
' pCounterPathElements : PDH_COUNTER_PATH_ELEMENTS_A* optional, out
' pdwBufferSize : DWORD* in/out
' dwFlags : DWORD
Declare PtrSafe Function PdhParseCounterPathA Lib "pdh" ( _
    ByVal szFullPathBuffer As String, _
    ByVal pCounterPathElements As LongPtr, _
    ByRef pdwBufferSize As Long, _
    ByVal dwFlags 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

PdhParseCounterPathA = ctypes.windll.pdh.PdhParseCounterPathA
PdhParseCounterPathA.restype = wintypes.DWORD
PdhParseCounterPathA.argtypes = [
    wintypes.LPCSTR,  # szFullPathBuffer : LPCSTR
    ctypes.c_void_p,  # pCounterPathElements : PDH_COUNTER_PATH_ELEMENTS_A* optional, out
    ctypes.POINTER(wintypes.DWORD),  # pdwBufferSize : DWORD* in/out
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('pdh.dll')
PdhParseCounterPathA = Fiddle::Function.new(
  lib['PdhParseCounterPathA'],
  [
    Fiddle::TYPE_VOIDP,  # szFullPathBuffer : LPCSTR
    Fiddle::TYPE_VOIDP,  # pCounterPathElements : PDH_COUNTER_PATH_ELEMENTS_A* optional, out
    Fiddle::TYPE_VOIDP,  # pdwBufferSize : DWORD* in/out
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  -Fiddle::TYPE_INT)

#[link(name = "pdh")]
extern "system" {
    fn PdhParseCounterPathA(
        szFullPathBuffer: *const u8,  // LPCSTR
        pCounterPathElements: *mut PDH_COUNTER_PATH_ELEMENTS_A,  // PDH_COUNTER_PATH_ELEMENTS_A* optional, out
        pdwBufferSize: *mut u32,  // DWORD* in/out
        dwFlags: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("pdh.dll", CharSet = CharSet.Ansi)]
public static extern uint PdhParseCounterPathA([MarshalAs(UnmanagedType.LPStr)] string szFullPathBuffer, IntPtr pCounterPathElements, ref uint pdwBufferSize, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'pdh_PdhParseCounterPathA' -Namespace Win32 -PassThru
# $api::PdhParseCounterPathA(szFullPathBuffer, pCounterPathElements, pdwBufferSize, dwFlags)

#uselib "pdh.dll"
#func global PdhParseCounterPathA "PdhParseCounterPathA" sptr, sptr, sptr, sptr
; PdhParseCounterPathA szFullPathBuffer, varptr(pCounterPathElements), varptr(pdwBufferSize), dwFlags   ; 戻り値は stat
; szFullPathBuffer : LPCSTR -> "sptr"
; pCounterPathElements : PDH_COUNTER_PATH_ELEMENTS_A* optional, out -> "sptr"
; pdwBufferSize : DWORD* in/out -> "sptr"
; dwFlags : DWORD -> "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 "pdh.dll"
#cfunc global PdhParseCounterPathA "PdhParseCounterPathA" str, var, var, int
; res = PdhParseCounterPathA(szFullPathBuffer, pCounterPathElements, pdwBufferSize, dwFlags)
; szFullPathBuffer : LPCSTR -> "str"
; pCounterPathElements : PDH_COUNTER_PATH_ELEMENTS_A* optional, out -> "var"
; pdwBufferSize : DWORD* in/out -> "var"
; dwFlags : DWORD -> "int"
; ※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。

; DWORD PdhParseCounterPathA(LPCSTR szFullPathBuffer, PDH_COUNTER_PATH_ELEMENTS_A* pCounterPathElements, DWORD* pdwBufferSize, DWORD dwFlags)
#uselib "pdh.dll"
#cfunc global PdhParseCounterPathA "PdhParseCounterPathA" str, var, var, int
; res = PdhParseCounterPathA(szFullPathBuffer, pCounterPathElements, pdwBufferSize, dwFlags)
; szFullPathBuffer : LPCSTR -> "str"
; pCounterPathElements : PDH_COUNTER_PATH_ELEMENTS_A* optional, out -> "var"
; pdwBufferSize : DWORD* in/out -> "var"
; dwFlags : DWORD -> "int"
; ※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 (
	pdh = windows.NewLazySystemDLL("pdh.dll")
	procPdhParseCounterPathA = pdh.NewProc("PdhParseCounterPathA")
)

// szFullPathBuffer (LPCSTR), pCounterPathElements (PDH_COUNTER_PATH_ELEMENTS_A* optional, out), pdwBufferSize (DWORD* in/out), dwFlags (DWORD)
r1, _, err := procPdhParseCounterPathA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(szFullPathBuffer))),
	uintptr(pCounterPathElements),
	uintptr(pdwBufferSize),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PdhParseCounterPathA(
  szFullPathBuffer: PAnsiChar;   // LPCSTR
  pCounterPathElements: Pointer;   // PDH_COUNTER_PATH_ELEMENTS_A* optional, out
  pdwBufferSize: Pointer;   // DWORD* in/out
  dwFlags: DWORD   // DWORD
): DWORD; stdcall;
  external 'pdh.dll' name 'PdhParseCounterPathA';

result := DllCall("pdh\PdhParseCounterPathA"
    , "AStr", szFullPathBuffer   ; LPCSTR
    , "Ptr", pCounterPathElements   ; PDH_COUNTER_PATH_ELEMENTS_A* optional, out
    , "Ptr", pdwBufferSize   ; DWORD* in/out
    , "UInt", dwFlags   ; DWORD
    , "UInt")   ; return: DWORD

●PdhParseCounterPathA(szFullPathBuffer, pCounterPathElements, pdwBufferSize, dwFlags) = DLL("pdh.dll", "dword PdhParseCounterPathA(char*, void*, void*, dword)")
# 呼び出し: PdhParseCounterPathA(szFullPathBuffer, pCounterPathElements, pdwBufferSize, dwFlags)
# szFullPathBuffer : LPCSTR -> "char*"
# pCounterPathElements : PDH_COUNTER_PATH_ELEMENTS_A* optional, out -> "void*"
# pdwBufferSize : DWORD* in/out -> "void*"
# dwFlags : DWORD -> "dword"
# 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)。