VarCmp

// OLEAUT32.dll
#include <windows.h>

VARCMP VarCmp(
    VARIANT* pvarLeft,
    VARIANT* pvarRight,
    DWORD lcid,
    DWORD dwFlags
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VarCmp(
    pvarLeft As IntPtr,   ' VARIANT*
    pvarRight As IntPtr,   ' VARIANT*
    lcid As UInteger,   ' DWORD
    dwFlags As UInteger   ' DWORD
) As UInteger
End Function

' pvarLeft : VARIANT*
' pvarRight : VARIANT*
' lcid : DWORD
' dwFlags : DWORD
Declare PtrSafe Function VarCmp Lib "oleaut32" ( _
    ByVal pvarLeft As LongPtr, _
    ByVal pvarRight As LongPtr, _
    ByVal lcid 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

VarCmp = ctypes.windll.oleaut32.VarCmp
VarCmp.restype = wintypes.DWORD
VarCmp.argtypes = [
    ctypes.c_void_p,  # pvarLeft : VARIANT*
    ctypes.c_void_p,  # pvarRight : VARIANT*
    wintypes.DWORD,  # lcid : DWORD
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VarCmp = Fiddle::Function.new(
  lib['VarCmp'],
  [
    Fiddle::TYPE_VOIDP,  # pvarLeft : VARIANT*
    Fiddle::TYPE_VOIDP,  # pvarRight : VARIANT*
    -Fiddle::TYPE_INT,  # lcid : DWORD
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  -Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VarCmp(
        pvarLeft: *mut VARIANT,  // VARIANT*
        pvarRight: *mut VARIANT,  // VARIANT*
        lcid: u32,  // DWORD
        dwFlags: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern uint VarCmp(IntPtr pvarLeft, IntPtr pvarRight, uint lcid, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarCmp' -Namespace Win32 -PassThru
# $api::VarCmp(pvarLeft, pvarRight, lcid, dwFlags)

#uselib "OLEAUT32.dll"
#func global VarCmp "VarCmp" sptr, sptr, sptr, sptr
; VarCmp varptr(pvarLeft), varptr(pvarRight), lcid, dwFlags   ; 戻り値は stat
; pvarLeft : VARIANT* -> "sptr"
; pvarRight : VARIANT* -> "sptr"
; lcid : DWORD -> "sptr"
; dwFlags : 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 "OLEAUT32.dll"
#cfunc global VarCmp "VarCmp" var, var, int, int
; res = VarCmp(pvarLeft, pvarRight, lcid, dwFlags)
; pvarLeft : VARIANT* -> "var"
; pvarRight : VARIANT* -> "var"
; lcid : DWORD -> "int"
; dwFlags : DWORD -> "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。

; VARCMP VarCmp(VARIANT* pvarLeft, VARIANT* pvarRight, DWORD lcid, DWORD dwFlags)
#uselib "OLEAUT32.dll"
#cfunc global VarCmp "VarCmp" var, var, int, int
; res = VarCmp(pvarLeft, pvarRight, lcid, dwFlags)
; pvarLeft : VARIANT* -> "var"
; pvarRight : VARIANT* -> "var"
; lcid : DWORD -> "int"
; dwFlags : DWORD -> "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 (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procVarCmp = oleaut32.NewProc("VarCmp")
)

// pvarLeft (VARIANT*), pvarRight (VARIANT*), lcid (DWORD), dwFlags (DWORD)
r1, _, err := procVarCmp.Call(
	uintptr(pvarLeft),
	uintptr(pvarRight),
	uintptr(lcid),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // VARCMP

function VarCmp(
  pvarLeft: Pointer;   // VARIANT*
  pvarRight: Pointer;   // VARIANT*
  lcid: DWORD;   // DWORD
  dwFlags: DWORD   // DWORD
): DWORD; stdcall;
  external 'OLEAUT32.dll' name 'VarCmp';

result := DllCall("OLEAUT32\VarCmp"
    , "Ptr", pvarLeft   ; VARIANT*
    , "Ptr", pvarRight   ; VARIANT*
    , "UInt", lcid   ; DWORD
    , "UInt", dwFlags   ; DWORD
    , "UInt")   ; return: VARCMP

●VarCmp(pvarLeft, pvarRight, lcid, dwFlags) = DLL("OLEAUT32.dll", "dword VarCmp(void*, void*, dword, dword)")
# 呼び出し: VarCmp(pvarLeft, pvarRight, lcid, dwFlags)
# pvarLeft : VARIANT* -> "void*"
# pvarRight : VARIANT* -> "void*"
# lcid : DWORD -> "dword"
# dwFlags : 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)。