RtlCrc32

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

DWORD RtlCrc32(
    const void* Buffer,
    UINT_PTR Size,
    DWORD InitialCrc
);

<DllImport("ntdll.dll", ExactSpelling:=True)>
Public Shared Function RtlCrc32(
    Buffer As IntPtr,   ' void*
    Size As UIntPtr,   ' UINT_PTR
    InitialCrc As UInteger   ' DWORD
) As UInteger
End Function

' Buffer : void*
' Size : UINT_PTR
' InitialCrc : DWORD
Declare PtrSafe Function RtlCrc32 Lib "ntdll" ( _
    ByVal Buffer As LongPtr, _
    ByVal Size As LongPtr, _
    ByVal InitialCrc 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

RtlCrc32 = ctypes.windll.ntdll.RtlCrc32
RtlCrc32.restype = wintypes.DWORD
RtlCrc32.argtypes = [
    ctypes.POINTER(None),  # Buffer : void*
    ctypes.c_size_t,  # Size : UINT_PTR
    wintypes.DWORD,  # InitialCrc : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ntdll.dll')
RtlCrc32 = Fiddle::Function.new(
  lib['RtlCrc32'],
  [
    Fiddle::TYPE_VOIDP,  # Buffer : void*
    Fiddle::TYPE_UINTPTR_T,  # Size : UINT_PTR
    -Fiddle::TYPE_INT,  # InitialCrc : DWORD
  ],
  -Fiddle::TYPE_INT)

#[link(name = "ntdll")]
extern "system" {
    fn RtlCrc32(
        Buffer: *const (),  // void*
        Size: usize,  // UINT_PTR
        InitialCrc: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ntdll.dll")]
public static extern uint RtlCrc32(IntPtr Buffer, UIntPtr Size, uint InitialCrc);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ntdll_RtlCrc32' -Namespace Win32 -PassThru
# $api::RtlCrc32(Buffer, Size, InitialCrc)

#uselib "ntdll.dll"
#func global RtlCrc32 "RtlCrc32" sptr, sptr, sptr
; RtlCrc32 Buffer, Size, InitialCrc   ; 戻り値は stat
; Buffer : void* -> "sptr"
; Size : UINT_PTR -> "sptr"
; InitialCrc : 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 "ntdll.dll"
#cfunc global RtlCrc32 "RtlCrc32" sptr, sptr, int
; res = RtlCrc32(Buffer, Size, InitialCrc)
; Buffer : void* -> "sptr"
; Size : UINT_PTR -> "sptr"
; InitialCrc : DWORD -> "int"

; DWORD RtlCrc32(void* Buffer, UINT_PTR Size, DWORD InitialCrc)
#uselib "ntdll.dll"
#cfunc global RtlCrc32 "RtlCrc32" intptr, intptr, int
; res = RtlCrc32(Buffer, Size, InitialCrc)
; Buffer : void* -> "intptr"
; Size : UINT_PTR -> "intptr"
; InitialCrc : DWORD -> "int"

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

var (
	ntdll = windows.NewLazySystemDLL("ntdll.dll")
	procRtlCrc32 = ntdll.NewProc("RtlCrc32")
)

// Buffer (void*), Size (UINT_PTR), InitialCrc (DWORD)
r1, _, err := procRtlCrc32.Call(
	uintptr(Buffer),
	uintptr(Size),
	uintptr(InitialCrc),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function RtlCrc32(
  Buffer: Pointer;   // void*
  Size: NativeUInt;   // UINT_PTR
  InitialCrc: DWORD   // DWORD
): DWORD; stdcall;
  external 'ntdll.dll' name 'RtlCrc32';

result := DllCall("ntdll\RtlCrc32"
    , "Ptr", Buffer   ; void*
    , "UPtr", Size   ; UINT_PTR
    , "UInt", InitialCrc   ; DWORD
    , "UInt")   ; return: DWORD

●RtlCrc32(Buffer, Size, InitialCrc) = DLL("ntdll.dll", "dword RtlCrc32(void*, int, dword)")
# 呼び出し: RtlCrc32(Buffer, Size, InitialCrc)
# Buffer : void* -> "void*"
# Size : UINT_PTR -> "int"
# InitialCrc : 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)。