PdhOpenQueryA

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

DWORD PdhOpenQueryA(
    LPCSTR szDataSource,   // optional
    UINT_PTR dwUserData,
    PDH_HQUERY* phQuery
);

<DllImport("pdh.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function PdhOpenQueryA(
    <MarshalAs(UnmanagedType.LPStr)> szDataSource As String,   ' LPCSTR optional
    dwUserData As UIntPtr,   ' UINT_PTR
    phQuery As IntPtr   ' PDH_HQUERY* out
) As UInteger
End Function

' szDataSource : LPCSTR optional
' dwUserData : UINT_PTR
' phQuery : PDH_HQUERY* out
Declare PtrSafe Function PdhOpenQueryA Lib "pdh" ( _
    ByVal szDataSource As String, _
    ByVal dwUserData As LongPtr, _
    ByVal phQuery 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

PdhOpenQueryA = ctypes.windll.pdh.PdhOpenQueryA
PdhOpenQueryA.restype = wintypes.DWORD
PdhOpenQueryA.argtypes = [
    wintypes.LPCSTR,  # szDataSource : LPCSTR optional
    ctypes.c_size_t,  # dwUserData : UINT_PTR
    ctypes.c_void_p,  # phQuery : PDH_HQUERY* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('pdh.dll')
PdhOpenQueryA = Fiddle::Function.new(
  lib['PdhOpenQueryA'],
  [
    Fiddle::TYPE_VOIDP,  # szDataSource : LPCSTR optional
    Fiddle::TYPE_UINTPTR_T,  # dwUserData : UINT_PTR
    Fiddle::TYPE_VOIDP,  # phQuery : PDH_HQUERY* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "pdh")]
extern "system" {
    fn PdhOpenQueryA(
        szDataSource: *const u8,  // LPCSTR optional
        dwUserData: usize,  // UINT_PTR
        phQuery: *mut *mut core::ffi::c_void  // PDH_HQUERY* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("pdh.dll", CharSet = CharSet.Ansi)]
public static extern uint PdhOpenQueryA([MarshalAs(UnmanagedType.LPStr)] string szDataSource, UIntPtr dwUserData, IntPtr phQuery);
"@
$api = Add-Type -MemberDefinition $sig -Name 'pdh_PdhOpenQueryA' -Namespace Win32 -PassThru
# $api::PdhOpenQueryA(szDataSource, dwUserData, phQuery)

#uselib "pdh.dll"
#func global PdhOpenQueryA "PdhOpenQueryA" sptr, sptr, sptr
; PdhOpenQueryA szDataSource, dwUserData, phQuery   ; 戻り値は stat
; szDataSource : LPCSTR optional -> "sptr"
; dwUserData : UINT_PTR -> "sptr"
; phQuery : PDH_HQUERY* 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 PdhOpenQueryA "PdhOpenQueryA" str, sptr, sptr
; res = PdhOpenQueryA(szDataSource, dwUserData, phQuery)
; szDataSource : LPCSTR optional -> "str"
; dwUserData : UINT_PTR -> "sptr"
; phQuery : PDH_HQUERY* out -> "sptr"

; DWORD PdhOpenQueryA(LPCSTR szDataSource, UINT_PTR dwUserData, PDH_HQUERY* phQuery)
#uselib "pdh.dll"
#cfunc global PdhOpenQueryA "PdhOpenQueryA" str, intptr, intptr
; res = PdhOpenQueryA(szDataSource, dwUserData, phQuery)
; szDataSource : LPCSTR optional -> "str"
; dwUserData : UINT_PTR -> "intptr"
; phQuery : PDH_HQUERY* out -> "intptr"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	pdh = windows.NewLazySystemDLL("pdh.dll")
	procPdhOpenQueryA = pdh.NewProc("PdhOpenQueryA")
)

// szDataSource (LPCSTR optional), dwUserData (UINT_PTR), phQuery (PDH_HQUERY* out)
r1, _, err := procPdhOpenQueryA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(szDataSource))),
	uintptr(dwUserData),
	uintptr(phQuery),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PdhOpenQueryA(
  szDataSource: PAnsiChar;   // LPCSTR optional
  dwUserData: NativeUInt;   // UINT_PTR
  phQuery: Pointer   // PDH_HQUERY* out
): DWORD; stdcall;
  external 'pdh.dll' name 'PdhOpenQueryA';

result := DllCall("pdh\PdhOpenQueryA"
    , "AStr", szDataSource   ; LPCSTR optional
    , "UPtr", dwUserData   ; UINT_PTR
    , "Ptr", phQuery   ; PDH_HQUERY* out
    , "UInt")   ; return: DWORD

●PdhOpenQueryA(szDataSource, dwUserData, phQuery) = DLL("pdh.dll", "dword PdhOpenQueryA(char*, int, void*)")
# 呼び出し: PdhOpenQueryA(szDataSource, dwUserData, phQuery)
# szDataSource : LPCSTR optional -> "char*"
# dwUserData : UINT_PTR -> "int"
# phQuery : PDH_HQUERY* 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)。