PdhGetFormattedCounterValue

// pdh.dll
#include <windows.h>

DWORD PdhGetFormattedCounterValue(
    PDH_HCOUNTER hCounter,
    PDH_FMT dwFormat,
    DWORD* lpdwType,   // optional
    PDH_FMT_COUNTERVALUE* pValue
);

<DllImport("pdh.dll", ExactSpelling:=True)>
Public Shared Function PdhGetFormattedCounterValue(
    hCounter As IntPtr,   ' PDH_HCOUNTER
    dwFormat As UInteger,   ' PDH_FMT
    lpdwType As IntPtr,   ' DWORD* optional, out
    pValue As IntPtr   ' PDH_FMT_COUNTERVALUE* out
) As UInteger
End Function

' hCounter : PDH_HCOUNTER
' dwFormat : PDH_FMT
' lpdwType : DWORD* optional, out
' pValue : PDH_FMT_COUNTERVALUE* out
Declare PtrSafe Function PdhGetFormattedCounterValue Lib "pdh" ( _
    ByVal hCounter As LongPtr, _
    ByVal dwFormat As Long, _
    ByVal lpdwType As LongPtr, _
    ByVal pValue 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

PdhGetFormattedCounterValue = ctypes.windll.pdh.PdhGetFormattedCounterValue
PdhGetFormattedCounterValue.restype = wintypes.DWORD
PdhGetFormattedCounterValue.argtypes = [
    wintypes.HANDLE,  # hCounter : PDH_HCOUNTER
    wintypes.DWORD,  # dwFormat : PDH_FMT
    ctypes.POINTER(wintypes.DWORD),  # lpdwType : DWORD* optional, out
    ctypes.c_void_p,  # pValue : PDH_FMT_COUNTERVALUE* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('pdh.dll')
PdhGetFormattedCounterValue = Fiddle::Function.new(
  lib['PdhGetFormattedCounterValue'],
  [
    Fiddle::TYPE_VOIDP,  # hCounter : PDH_HCOUNTER
    -Fiddle::TYPE_INT,  # dwFormat : PDH_FMT
    Fiddle::TYPE_VOIDP,  # lpdwType : DWORD* optional, out
    Fiddle::TYPE_VOIDP,  # pValue : PDH_FMT_COUNTERVALUE* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "pdh")]
extern "system" {
    fn PdhGetFormattedCounterValue(
        hCounter: *mut core::ffi::c_void,  // PDH_HCOUNTER
        dwFormat: u32,  // PDH_FMT
        lpdwType: *mut u32,  // DWORD* optional, out
        pValue: *mut PDH_FMT_COUNTERVALUE  // PDH_FMT_COUNTERVALUE* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("pdh.dll")]
public static extern uint PdhGetFormattedCounterValue(IntPtr hCounter, uint dwFormat, IntPtr lpdwType, IntPtr pValue);
"@
$api = Add-Type -MemberDefinition $sig -Name 'pdh_PdhGetFormattedCounterValue' -Namespace Win32 -PassThru
# $api::PdhGetFormattedCounterValue(hCounter, dwFormat, lpdwType, pValue)

#uselib "pdh.dll"
#func global PdhGetFormattedCounterValue "PdhGetFormattedCounterValue" sptr, sptr, sptr, sptr
; PdhGetFormattedCounterValue hCounter, dwFormat, varptr(lpdwType), varptr(pValue)   ; 戻り値は stat
; hCounter : PDH_HCOUNTER -> "sptr"
; dwFormat : PDH_FMT -> "sptr"
; lpdwType : DWORD* optional, out -> "sptr"
; pValue : PDH_FMT_COUNTERVALUE* 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 "pdh.dll"
#cfunc global PdhGetFormattedCounterValue "PdhGetFormattedCounterValue" sptr, int, var, var
; res = PdhGetFormattedCounterValue(hCounter, dwFormat, lpdwType, pValue)
; hCounter : PDH_HCOUNTER -> "sptr"
; dwFormat : PDH_FMT -> "int"
; lpdwType : DWORD* optional, out -> "var"
; pValue : PDH_FMT_COUNTERVALUE* 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。

; DWORD PdhGetFormattedCounterValue(PDH_HCOUNTER hCounter, PDH_FMT dwFormat, DWORD* lpdwType, PDH_FMT_COUNTERVALUE* pValue)
#uselib "pdh.dll"
#cfunc global PdhGetFormattedCounterValue "PdhGetFormattedCounterValue" intptr, int, var, var
; res = PdhGetFormattedCounterValue(hCounter, dwFormat, lpdwType, pValue)
; hCounter : PDH_HCOUNTER -> "intptr"
; dwFormat : PDH_FMT -> "int"
; lpdwType : DWORD* optional, out -> "var"
; pValue : PDH_FMT_COUNTERVALUE* 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 (
	pdh = windows.NewLazySystemDLL("pdh.dll")
	procPdhGetFormattedCounterValue = pdh.NewProc("PdhGetFormattedCounterValue")
)

// hCounter (PDH_HCOUNTER), dwFormat (PDH_FMT), lpdwType (DWORD* optional, out), pValue (PDH_FMT_COUNTERVALUE* out)
r1, _, err := procPdhGetFormattedCounterValue.Call(
	uintptr(hCounter),
	uintptr(dwFormat),
	uintptr(lpdwType),
	uintptr(pValue),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PdhGetFormattedCounterValue(
  hCounter: THandle;   // PDH_HCOUNTER
  dwFormat: DWORD;   // PDH_FMT
  lpdwType: Pointer;   // DWORD* optional, out
  pValue: Pointer   // PDH_FMT_COUNTERVALUE* out
): DWORD; stdcall;
  external 'pdh.dll' name 'PdhGetFormattedCounterValue';

result := DllCall("pdh\PdhGetFormattedCounterValue"
    , "Ptr", hCounter   ; PDH_HCOUNTER
    , "UInt", dwFormat   ; PDH_FMT
    , "Ptr", lpdwType   ; DWORD* optional, out
    , "Ptr", pValue   ; PDH_FMT_COUNTERVALUE* out
    , "UInt")   ; return: DWORD

●PdhGetFormattedCounterValue(hCounter, dwFormat, lpdwType, pValue) = DLL("pdh.dll", "dword PdhGetFormattedCounterValue(void*, dword, void*, void*)")
# 呼び出し: PdhGetFormattedCounterValue(hCounter, dwFormat, lpdwType, pValue)
# hCounter : PDH_HCOUNTER -> "void*"
# dwFormat : PDH_FMT -> "dword"
# lpdwType : DWORD* optional, out -> "void*"
# pValue : PDH_FMT_COUNTERVALUE* 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)。