PdhMakeCounterPathA

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

DWORD PdhMakeCounterPathA(
    PDH_COUNTER_PATH_ELEMENTS_A* pCounterPathElements,
    LPSTR szFullPathBuffer,   // optional
    DWORD* pcchBufferSize,
    PDH_PATH_FLAGS dwFlags
);

<DllImport("pdh.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function PdhMakeCounterPathA(
    pCounterPathElements As IntPtr,   ' PDH_COUNTER_PATH_ELEMENTS_A*
    <MarshalAs(UnmanagedType.LPStr)> szFullPathBuffer As System.Text.StringBuilder,   ' LPSTR optional, out
    ByRef pcchBufferSize As UInteger,   ' DWORD* in/out
    dwFlags As UInteger   ' PDH_PATH_FLAGS
) As UInteger
End Function

' pCounterPathElements : PDH_COUNTER_PATH_ELEMENTS_A*
' szFullPathBuffer : LPSTR optional, out
' pcchBufferSize : DWORD* in/out
' dwFlags : PDH_PATH_FLAGS
Declare PtrSafe Function PdhMakeCounterPathA Lib "pdh" ( _
    ByVal pCounterPathElements As LongPtr, _
    ByVal szFullPathBuffer As String, _
    ByRef pcchBufferSize 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

PdhMakeCounterPathA = ctypes.windll.pdh.PdhMakeCounterPathA
PdhMakeCounterPathA.restype = wintypes.DWORD
PdhMakeCounterPathA.argtypes = [
    ctypes.c_void_p,  # pCounterPathElements : PDH_COUNTER_PATH_ELEMENTS_A*
    wintypes.LPSTR,  # szFullPathBuffer : LPSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcchBufferSize : DWORD* in/out
    wintypes.DWORD,  # dwFlags : PDH_PATH_FLAGS
]

require 'fiddle'
require 'fiddle/import'

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

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

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

#uselib "pdh.dll"
#func global PdhMakeCounterPathA "PdhMakeCounterPathA" sptr, sptr, sptr, sptr
; PdhMakeCounterPathA varptr(pCounterPathElements), varptr(szFullPathBuffer), varptr(pcchBufferSize), dwFlags   ; 戻り値は stat
; pCounterPathElements : PDH_COUNTER_PATH_ELEMENTS_A* -> "sptr"
; szFullPathBuffer : LPSTR optional, out -> "sptr"
; pcchBufferSize : DWORD* in/out -> "sptr"
; dwFlags : PDH_PATH_FLAGS -> "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 PdhMakeCounterPathA "PdhMakeCounterPathA" var, var, var, int
; res = PdhMakeCounterPathA(pCounterPathElements, szFullPathBuffer, pcchBufferSize, dwFlags)
; pCounterPathElements : PDH_COUNTER_PATH_ELEMENTS_A* -> "var"
; szFullPathBuffer : LPSTR optional, out -> "var"
; pcchBufferSize : DWORD* in/out -> "var"
; dwFlags : PDH_PATH_FLAGS -> "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 PdhMakeCounterPathA(PDH_COUNTER_PATH_ELEMENTS_A* pCounterPathElements, LPSTR szFullPathBuffer, DWORD* pcchBufferSize, PDH_PATH_FLAGS dwFlags)
#uselib "pdh.dll"
#cfunc global PdhMakeCounterPathA "PdhMakeCounterPathA" var, var, var, int
; res = PdhMakeCounterPathA(pCounterPathElements, szFullPathBuffer, pcchBufferSize, dwFlags)
; pCounterPathElements : PDH_COUNTER_PATH_ELEMENTS_A* -> "var"
; szFullPathBuffer : LPSTR optional, out -> "var"
; pcchBufferSize : DWORD* in/out -> "var"
; dwFlags : PDH_PATH_FLAGS -> "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")
	procPdhMakeCounterPathA = pdh.NewProc("PdhMakeCounterPathA")
)

// pCounterPathElements (PDH_COUNTER_PATH_ELEMENTS_A*), szFullPathBuffer (LPSTR optional, out), pcchBufferSize (DWORD* in/out), dwFlags (PDH_PATH_FLAGS)
r1, _, err := procPdhMakeCounterPathA.Call(
	uintptr(pCounterPathElements),
	uintptr(szFullPathBuffer),
	uintptr(pcchBufferSize),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PdhMakeCounterPathA(
  pCounterPathElements: Pointer;   // PDH_COUNTER_PATH_ELEMENTS_A*
  szFullPathBuffer: PAnsiChar;   // LPSTR optional, out
  pcchBufferSize: Pointer;   // DWORD* in/out
  dwFlags: DWORD   // PDH_PATH_FLAGS
): DWORD; stdcall;
  external 'pdh.dll' name 'PdhMakeCounterPathA';

result := DllCall("pdh\PdhMakeCounterPathA"
    , "Ptr", pCounterPathElements   ; PDH_COUNTER_PATH_ELEMENTS_A*
    , "Ptr", szFullPathBuffer   ; LPSTR optional, out
    , "Ptr", pcchBufferSize   ; DWORD* in/out
    , "UInt", dwFlags   ; PDH_PATH_FLAGS
    , "UInt")   ; return: DWORD

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