WHvReadVpciDeviceRegister

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

HRESULT WHvReadVpciDeviceRegister(
    WHV_PARTITION_HANDLE Partition,
    ULONGLONG LogicalDeviceId,
    const WHV_VPCI_DEVICE_REGISTER* Register,
    void* Data
);

<DllImport("WinHvPlatform.dll", ExactSpelling:=True)>
Public Shared Function WHvReadVpciDeviceRegister(
    Partition As IntPtr,   ' WHV_PARTITION_HANDLE
    LogicalDeviceId As ULong,   ' ULONGLONG
    Register As IntPtr,   ' WHV_VPCI_DEVICE_REGISTER*
    Data As IntPtr   ' void* out
) As Integer
End Function

' Partition : WHV_PARTITION_HANDLE
' LogicalDeviceId : ULONGLONG
' Register : WHV_VPCI_DEVICE_REGISTER*
' Data : void* out
Declare PtrSafe Function WHvReadVpciDeviceRegister Lib "winhvplatform" ( _
    ByVal Partition As LongPtr, _
    ByVal LogicalDeviceId As LongLong, _
    ByVal Register As LongPtr, _
    ByVal Data 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

WHvReadVpciDeviceRegister = ctypes.windll.winhvplatform.WHvReadVpciDeviceRegister
WHvReadVpciDeviceRegister.restype = ctypes.c_int
WHvReadVpciDeviceRegister.argtypes = [
    ctypes.c_ssize_t,  # Partition : WHV_PARTITION_HANDLE
    ctypes.c_ulonglong,  # LogicalDeviceId : ULONGLONG
    ctypes.c_void_p,  # Register : WHV_VPCI_DEVICE_REGISTER*
    ctypes.POINTER(None),  # Data : void* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WinHvPlatform.dll')
WHvReadVpciDeviceRegister = Fiddle::Function.new(
  lib['WHvReadVpciDeviceRegister'],
  [
    Fiddle::TYPE_INTPTR_T,  # Partition : WHV_PARTITION_HANDLE
    -Fiddle::TYPE_LONG_LONG,  # LogicalDeviceId : ULONGLONG
    Fiddle::TYPE_VOIDP,  # Register : WHV_VPCI_DEVICE_REGISTER*
    Fiddle::TYPE_VOIDP,  # Data : void* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "winhvplatform")]
extern "system" {
    fn WHvReadVpciDeviceRegister(
        Partition: isize,  // WHV_PARTITION_HANDLE
        LogicalDeviceId: u64,  // ULONGLONG
        Register: *const WHV_VPCI_DEVICE_REGISTER,  // WHV_VPCI_DEVICE_REGISTER*
        Data: *mut ()  // void* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WinHvPlatform.dll")]
public static extern int WHvReadVpciDeviceRegister(IntPtr Partition, ulong LogicalDeviceId, IntPtr Register, IntPtr Data);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WinHvPlatform_WHvReadVpciDeviceRegister' -Namespace Win32 -PassThru
# $api::WHvReadVpciDeviceRegister(Partition, LogicalDeviceId, Register, Data)

#uselib "WinHvPlatform.dll"
#func global WHvReadVpciDeviceRegister "WHvReadVpciDeviceRegister" sptr, sptr, sptr, sptr
; WHvReadVpciDeviceRegister Partition, LogicalDeviceId, varptr(Register), Data   ; 戻り値は stat
; Partition : WHV_PARTITION_HANDLE -> "sptr"
; LogicalDeviceId : ULONGLONG -> "sptr"
; Register : WHV_VPCI_DEVICE_REGISTER* -> "sptr"
; Data : void* out -> "sptr"
; ※HSP3.7は int64 引数(64bit値渡し)に非対応です。
; ※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 "WinHvPlatform.dll"
#cfunc global WHvReadVpciDeviceRegister "WHvReadVpciDeviceRegister" sptr, int64, var, sptr
; res = WHvReadVpciDeviceRegister(Partition, LogicalDeviceId, Register, Data)
; Partition : WHV_PARTITION_HANDLE -> "sptr"
; LogicalDeviceId : ULONGLONG -> "int64"
; Register : WHV_VPCI_DEVICE_REGISTER* -> "var"
; Data : void* out -> "sptr"
; ※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。
; ※int64 引数の DLL 値渡しは x64 ランタイム(hsp3_64)のみ対応(x86 は未対応)。

; HRESULT WHvReadVpciDeviceRegister(WHV_PARTITION_HANDLE Partition, ULONGLONG LogicalDeviceId, WHV_VPCI_DEVICE_REGISTER* Register, void* Data)
#uselib "WinHvPlatform.dll"
#cfunc global WHvReadVpciDeviceRegister "WHvReadVpciDeviceRegister" intptr, int64, var, intptr
; res = WHvReadVpciDeviceRegister(Partition, LogicalDeviceId, Register, Data)
; Partition : WHV_PARTITION_HANDLE -> "intptr"
; LogicalDeviceId : ULONGLONG -> "int64"
; Register : WHV_VPCI_DEVICE_REGISTER* -> "var"
; Data : void* out -> "intptr"
; ※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 (
	winhvplatform = windows.NewLazySystemDLL("WinHvPlatform.dll")
	procWHvReadVpciDeviceRegister = winhvplatform.NewProc("WHvReadVpciDeviceRegister")
)

// Partition (WHV_PARTITION_HANDLE), LogicalDeviceId (ULONGLONG), Register (WHV_VPCI_DEVICE_REGISTER*), Data (void* out)
r1, _, err := procWHvReadVpciDeviceRegister.Call(
	uintptr(Partition),
	uintptr(LogicalDeviceId),
	uintptr(Register),
	uintptr(Data),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function WHvReadVpciDeviceRegister(
  Partition: NativeInt;   // WHV_PARTITION_HANDLE
  LogicalDeviceId: UInt64;   // ULONGLONG
  Register: Pointer;   // WHV_VPCI_DEVICE_REGISTER*
  Data: Pointer   // void* out
): Integer; stdcall;
  external 'WinHvPlatform.dll' name 'WHvReadVpciDeviceRegister';

result := DllCall("WinHvPlatform\WHvReadVpciDeviceRegister"
    , "Ptr", Partition   ; WHV_PARTITION_HANDLE
    , "Int64", LogicalDeviceId   ; ULONGLONG
    , "Ptr", Register   ; WHV_VPCI_DEVICE_REGISTER*
    , "Ptr", Data   ; void* out
    , "Int")   ; return: HRESULT

●WHvReadVpciDeviceRegister(Partition, LogicalDeviceId, Register, Data) = DLL("WinHvPlatform.dll", "int WHvReadVpciDeviceRegister(int, qword, void*, void*)")
# 呼び出し: WHvReadVpciDeviceRegister(Partition, LogicalDeviceId, Register, Data)
# Partition : WHV_PARTITION_HANDLE -> "int"
# LogicalDeviceId : ULONGLONG -> "qword"
# Register : WHV_VPCI_DEVICE_REGISTER* -> "void*"
# Data : void* 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)。